Samsung TV Input Source Problems: The Complete Troubleshooting Guide [2026]

Your Samsung TV won't change inputs. The source button does nothing. Maybe the screen just says "No Signal" when your PlayStation 5 is clearly powered on and connected. You're not alone - Samsung TV input source problems rank among the most common support requests, affecting millions of users every year.

Here's what most people don't realize: roughly 90% of these issues stem from software glitches or configuration problems, not hardware failures. That means you can fix them yourself, usually in under 10 minutes, without calling Samsung Support or paying for a technician.

This guide covers every Samsung TV input problem you might encounter - from frozen source menus and HDMI "No Signal" errors to auto-switching issues and greyed-out inputs. Whether you own a 2018 Crystal UHD or the latest 2026 Neo QLED, you'll find the exact fix you need.

Quick Diagnosis: Identify Your Samsung TV Input Problem in 60 Seconds

Before trying random fixes, take 60 seconds to identify exactly which problem you're facing. Different symptoms require different solutions, and starting with the right approach saves you significant time.

Here's what happens when Samsung TV input sources malfunction: The TV either won't respond to source/input changes, displays error messages, shows the wrong input, or automatically switches away from your chosen source. Each scenario has distinct causes and fixes.

Based on analysis of thousands of Samsung Community support cases, input problems fall into six main categories:

Try This First (Resolves 45% of All Input Issues):

1. Unplug your Samsung TV from the wall outlet

2. Wait exactly 30 seconds - not less

3. While unplugged, hold the power button on the TV itself (not the remote) for 10 seconds

4. Plug the TV back in and power on normally

5. Test input switching

If that 30-second power cycle fixed your problem, you're done. If not, identify your specific issue from the table above and jump to the relevant section.

For persistent Samsung TV troubleshooting needs beyond input issues, the diagnostic approach remains similar - identify the symptom, understand the cause, then apply the targeted fix.

What Causes Samsung TV Input Source Problems? (Common Causes Explained)

Understanding why your Samsung TV can't change input helps you fix it faster and prevent future occurrences. Six primary causes account for nearly every input problem you'll encounter.

1. Software Glitches (Most Common - Approximately 45% of Cases)

Samsung TVs run Tizen OS, and like any operating system, it accumulates cached data and temporary files over time. When this data becomes corrupted or the TV's memory fills up, the source menu can freeze, become unresponsive, or display incorrectly.

The fix is simple: a power cycle clears volatile memory and resets the operating system without affecting your settings. This is why unplugging for 30 seconds resolves so many input issues - you're essentially giving Tizen a fresh start.

2. HDMI Handshake Failures (Approximately 25% of Cases)

When you connect an HDMI device to your TV, both devices perform a "handshake" - a communication protocol where they agree on resolution, refresh rate, color depth, and copy protection (HDCP). If this handshake fails partway through, you'll see "No Signal" even though everything is physically connected.

Handshake failures commonly occur when:

• The cable doesn't support the required bandwidth (older cables with 4K HDR devices)

• One device powers on before the other completes its boot sequence

• HDCP authentication fails (especially with older devices connecting to newer TVs)

• Resolution settings on the source device exceed what the TV expects

3. Anynet+ (HDMI-CEC) Conflicts (Approximately 15% of Cases)

This is where it gets frustrating. HDMI-CEC - Samsung calls it Anynet+ - allows connected devices to control each other. When your PlayStation powers on, it sends a CEC signal telling the TV to switch to its input. Convenient in theory.

The problem? Multiple devices send conflicting CEC commands. Your soundbar tells the TV to switch to ARC. Your streaming stick wakes up from sleep mode and demands attention. Suddenly your TV is switching inputs seemingly at random, or your deliberate input changes get overridden.

If you're experiencing related issues where your Samsung TV frozen on a single input, CEC conflicts often play a role.

4. Remote Control Issues (Approximately 8% of Cases)

Samsung smart remotes use Bluetooth for most functions but rely on infrared (IR) for certain commands including power and source selection on some models. Low batteries, lost Bluetooth pairing, or IR sensor obstructions can make the source button appear non-functional while other buttons work fine.

5. Firmware Bugs (Approximately 5% of Cases)

Samsung releases firmware updates that occasionally introduce input detection bugs. The Samsung Community forums regularly see spikes in "input not working" reports following major Samsung TV firmware update releases. Fortunately, Samsung typically patches these issues within weeks.

6. Hardware Failures (Approximately 2% of Cases)

Actual HDMI port failures are rare but do occur, particularly on TVs more than 3-4 years old or those that have experienced power surges. Signs include multiple ports failing simultaneously, visible physical damage, or issues that persist through every troubleshooting step including factory reset.

Basic Troubleshooting: Quick Fixes That Work in Minutes

These five fixes resolve the majority of Samsung TV input problems. Work through them in order - they're arranged from fastest/most effective to more involved solutions.

Fix 1: The 30-Second Power Cycle (Success Rate: ~45%)

This isn't just "turn it off and on again." The specific timing matters because Samsung TV capacitors need approximately 30 seconds to fully discharge, which clears the volatile memory where software glitches often hide.

Step-by-step:

1. Unplug your Samsung TV directly from the wall outlet (not from a power strip if possible)

2. Wait exactly 30 seconds - set a timer

3. While still unplugged, press and hold the power button on the TV itself for 10 seconds

4. Plug the TV back in

5. Power on using the remote and test source switching

Success indicator: The source menu opens normally, and you can navigate between inputs without delay or freezing.

Fix 2: Remote Control Reset (Success Rate: ~35%)

If other remote buttons work but Source doesn't respond, your Samsung Smart Remote may need re-pairing.

For Samsung Smart Remotes (2016 and newer):

1. Point the remote directly at your TV from within 1 foot distance

2. Press and hold the Return and Play/Pause buttons simultaneously for 3+ seconds

3. Watch for the pairing message on your TV screen

4. Wait for "Pairing Complete" confirmation

For older IR remotes:

1. Replace the batteries with fresh ones (even if the remote "seems" to work)

2. Ensure nothing blocks the IR sensor on the TV (usually near the Samsung logo at the bottom center)

3. Test from directly in front of the TV, not at an angle

Need more help? Our guide on how to pair Samsung TV remote covers every Samsung remote model and generation.

Fix 3: HDMI Cable Reseat (Success Rate: ~30%)

Loose HDMI connections cause more "No Signal" errors than any other single factor. Even cables that look secure can have incomplete pin contact.

The correct reseating procedure:

1. Disconnect the HDMI cable from both the TV and the external device

2. Wait 10 seconds

3. Inspect both ends for bent pins, debris, or damage

4. Reconnect to the device first, then to the TV

5. Power on the device, wait for it to fully boot

6. Select the correct source on your TV

Why device-first matters: When you connect to the device first, it initiates the HDMI handshake in the correct sequence. This prevents many handshake failures that cause "No Signal" errors.

To properly reset HDMI ports Samsung TV connections, this physical reconnection combined with a power cycle often does the trick.

Fix 4: Verify Correct Source Selection (Success Rate: ~25%)

This sounds obvious, but source selection errors account for a significant portion of "HDMI not working" reports. Samsung TVs have multiple HDMI ports, and it's easy to connect to HDMI 2 while selecting HDMI 1.

Verification steps:

1. Physically trace your HDMI cable from the device to the TV

2. Note exactly which HDMI port it's connected to (HDMI 1, 2, 3, or 4 - check the label on the port)

3. Press Home on your remote

4. Navigate to Source (the icon showing connection ports)

5. Select the matching HDMI number

Fix 5: Check External Device Status (Success Rate: ~20%)

Your TV can't display signal from a device that isn't outputting signal. Devices in sleep mode, hibernate, or standby don't always send video output.

Verification checklist:

• Is the device power light on (not blinking standby)?

• If it's a gaming console, is it fully booted (not in rest mode)?

• If it's a streaming device, has it finished its startup sequence?

• Can you test the device on a different TV or monitor?

If all five quick fixes fail: Your issue likely requires more targeted troubleshooting. Identify your specific symptom and proceed to the relevant section below.

How to Power Cycle Your Samsung TV (Soft Reset vs Hard Reset)

People often confuse "power cycle," "soft reset," and "hard reset." Understanding the differences helps you choose the right approach for your specific situation.

What Is a Soft Reset?

A soft reset clears your TV's temporary memory and restarts the operating system without erasing any settings, apps, or preferences. Think of it like restarting a computer - everything comes back exactly as it was, but any temporary glitches get cleared.

Soft Reset Method 1: Remote Power Hold

1. With the TV powered on, press and hold the Power button on your Samsung remote for 5-6 seconds

2. The TV will turn off

3. After a few seconds, the Samsung logo appears and the TV restarts

4. All your settings remain intact

Soft Reset Method 2: Unplug Method (More Thorough)

1. Unplug the TV from the wall outlet

2. Wait exactly 30 seconds (this is critical - capacitors need time to discharge)

3. While unplugged, hold the power button on the TV itself for 10 seconds

4. Plug back in and power on normally

The unplug method is more effective because it clears residual electrical charge that the remote method doesn't affect. For recurring issues, always use the unplug method.

What Is a Hard Reset (Factory Reset)?

A factory reset erases everything and returns the TV to its out-of-box state. You'll lose:

• All installed apps and their login credentials

• Picture and sound customizations

• Wi-Fi network settings

• Samsung account associations

• Channel lists and favorites

• Parental control settings

When to factory reset:

• Only after all other troubleshooting has failed

• When software corruption is suspected

• Before selling or giving away your TV

Factory reset should be your last resort, not your first attempt. If you need full Samsung TV setup instructions after a reset, plan for 15-20 minutes to reconfigure everything.

The 30-Second Rule Explained

Why 30 seconds specifically? Samsung TVs contain capacitors that store electrical charge even when unplugged. These capacitors power volatile memory that maintains temporary data. Full discharge takes approximately 30 seconds.

Unplugging for only 5-10 seconds often fails because the capacitors retain enough charge to preserve the corrupted data you're trying to clear. The extra 20 seconds makes the difference between a successful reset and wasted effort.

Samsung TV HDMI Not Working: Complete Troubleshooting Guide

HDMI problems deserve their own section because they're the most common input issues and have the most potential causes. Whether you're seeing Samsung TV no signal messages or dealing with intermittent connection drops, this systematic approach will identify and fix the problem.

Step 1: Verify Device Power State

External devices in sleep, hibernate, or standby mode often don't output video signal. Your TV correctly reports "No Signal" because there genuinely isn't one.

Check these indicators:

• Power LED is solid (not blinking)

• Device fan is running (for gaming consoles)

• Device screen shows activity (for laptops/PCs)

For gaming consoles specifically:

• PS5: Ensure it's not in Rest Mode (solid orange light means rest mode)

• Xbox Series X: Check that Instant-On isn't causing issues

• Nintendo Switch: Dock status light should be solid green

Step 2: Check Physical Connections

Loose HDMI cables cause the majority of "No Signal" errors. Even firm-looking connections can have incomplete contact.

Proper connection sequence:

1. Power off both the TV and external device

2. Disconnect HDMI from both ends

3. Inspect the cable for bent pins or physical damage

4. Reconnect to the device first, pushing firmly until you feel it click

5. Reconnect to the TV with the same firm push

6. Power on the device and wait for full boot

7. Power on the TV and select the correct source

Step 3: Try a Different HDMI Port

Samsung TVs typically have 3-4 HDMI ports. If one port consistently fails while others work, that port may be damaged.

Testing procedure:

1. Move your HDMI cable to a different port (HDMI 1 → HDMI 2)

2. Update your source selection to match the new port

3. Test the connection

Document your findings: If HDMI 2 works but HDMI 1 doesn't, you've identified a potential hardware issue with that specific port. Continue using the working port, but consider professional diagnosis if your TV is under warranty.

Step 4: Use Samsung's Built-in HDMI Troubleshooting

Most Samsung Smart TVs include a diagnostic tool specifically for HDMI issues. This tool tests cable quality and port functionality.

Navigation path (varies by model year):

• 2023-2026 models: Settings > Support > Device Care > Self Diagnosis > HDMI Troubleshooting

• 2020-2022 models: Settings > Support > Self Diagnosis > Signal Information > HDMI Cable Test

• 2017-2019 models: Settings > Support > Self Diagnosis > Start HDMI Troubleshooting

The diagnostic will test your connection and report whether the cable meets requirements for your content type (4K, HDR, etc.).

Step 5: Enable Input Signal Plus for 4K/HDR Devices

This is the setting most people miss. For 4K HDR content (PS5, Xbox Series X, Apple TV 4K, 4K Blu-ray players), you must enable Input Signal Plus on the specific HDMI port you're using.

Navigation path:

• 2025-2026 models: Settings > All Settings > Connection > External Device Manager > Input Signal Plus

• 2022-2024 models: Settings > General > External Device Manager > Input Signal Plus

• 2019-2021 models: Settings > General > External Device Manager > HDMI UHD Color

Select the HDMI port your 4K device is connected to and toggle the setting ON.

What Input Signal Plus does: It enables full HDMI 2.0/2.1 bandwidth on that port. Without it, the port operates at limited bandwidth suitable only for 1080p SDR content. When a 4K HDR device tries to output on a limited-bandwidth port, the handshake fails - resulting in "No Signal."

Step 6: Test with a Known-Good Cable

Not all HDMI cables support all features. For reliable 4K HDR at 60Hz, you need at minimum a Premium High Speed HDMI cable (18Gbps). For 4K 120Hz or 8K content, you need an Ultra High Speed HDMI cable (48Gbps).

Cable certification levels:

• Standard HDMI: 1080i maximum (inadequate for modern devices)

• High Speed HDMI: 4K 30Hz (marginal for gaming)

• Premium High Speed HDMI: 4K 60Hz HDR (recommended minimum)

• Ultra High Speed HDMI: 4K 120Hz, 8K (required for PS5/Xbox 120Hz gaming)

If you're experiencing issues with streaming devices like Firestick not working Samsung TV setups, cable quality is often the culprit.

Step 7: Check Resolution Compatibility

If your device outputs a resolution your TV doesn't support, you'll see "Mode Not Supported" instead of "No Signal." This commonly happens when connecting PCs configured for unusual refresh rates.

Quick fix: Boot your device in safe mode or low-resolution mode, then adjust output settings to match your TV's capabilities. For mode not supported Samsung TV errors, starting at 1080p 60Hz and gradually increasing resolution identifies the compatibility ceiling.

Hardware Failure Indicators

How do you know when the problem is hardware rather than settings? Look for these signs:

• Multiple HDMI ports fail simultaneously

• Issues persist through factory reset

• Physical damage visible on ports (bent pins, burn marks)

• Burning smell when using HDMI ports

• TV recognizes HDMI connection but never displays video from any device

If you're experiencing hardware failure indicators, skip to Section 11: When to Contact Samsung Support.

How to Fix Samsung TV Automatically Switching Inputs (Anynet+/HDMI-CEC)

Few things are more frustrating than settling in to watch a movie, only to have your TV randomly switch to a different input. This auto-switching behavior almost always traces back to Anynet+ (Samsung's implementation of HDMI-CEC).

Understanding Anynet+ (HDMI-CEC)

HDMI-CEC stands for Consumer Electronics Control - a feature allowing HDMI-connected devices to communicate and control each other. When properly configured, it's genuinely convenient: turn on your PS5, and the TV automatically switches to that input and powers on.

The problem arises when multiple devices send conflicting commands. Your soundbar, gaming console, streaming stick, and Blu-ray player all have CEC capabilities. When your Fire Stick exits sleep mode at 2 AM to download an update, it sends a "switch to me" command. Suddenly your TV turns on and switches away from your cable box - and you wake up to infomercials instead of your scheduled recording.

This same behavior can cause Samsung TV turns on by itself issues. The solutions overlap significantly.

Solution 1: Disable Auto Input Switch (Recommended)

Rather than disabling Anynet+ entirely, you can disable just the auto-switching component while keeping other convenient features like one-remote control.

Navigation paths by model year:

2025-2026 models: Settings > All Settings > General & Privacy > External Device Manager > Anynet+ (HDMI-CEC) > Turn OFF "Auto Turn On"

2023-2024 models: Settings > All Settings > Connection > External Device Manager > Anynet+ (HDMI-CEC) > Toggle OFF "Auto Turn On"

2022 models: Settings > General & Privacy > External Device Manager > Anynet+ (HDMI-CEC) > Disable "Auto Turn On"

2017-2021 models: Settings > General > External Device Manager > Anynet+ > Turn OFF "Auto Turn On"

Solution 2: Secret Code Method (Older TVs)

For some older Samsung TVs, a hidden code disables auto-switching without accessing the normal menu.

Procedure:

1. Navigate to the TV source (regular broadcast TV, not an HDMI source)

2. Point your remote at the TV

3. Press: Mute > Volume Down > Channel Down > Mute

4. No on-screen confirmation appears - the code executes silently

Test by powering on a connected HDMI device. If the TV no longer switches automatically, the code worked. If the TV still switches, the code wasn't entered quickly enough - try again.

Solution 3: Disable CEC on Individual Devices

Rather than changing TV settings, you can disable CEC on specific problematic devices. This is ideal when you want one device (like a soundbar) to use CEC while preventing another (like a streaming stick) from controlling your TV.

Common device CEC settings locations:

Solution 4: Set Default Startup Input

If you want your TV to always start on a specific input rather than Smart Hub or the last-used input:

Navigation: Settings > General & Privacy > Start Screen Options

Configure:

• Turn OFF "Start with Smart Hub Home"

• Enable "Autorun Last App" to resume your previous input

• Or select a specific input as default startup

When to Keep Anynet+ Enabled

Don't reflexively disable Anynet+ entirely - it provides genuine value in some setups. Keep it enabled if:

• You use a Samsung TV HDMI ARC soundbar and want one-remote volume control

• You prefer your TV to auto-power when turning on a game console

• You want to control all devices with your Samsung remote

The selective approach works best: disable auto-switching while keeping device control enabled, or disable CEC only on problematic devices rather than globally.

How to Change Input on Samsung TV Without Remote (7 Proven Methods)

Lost your remote? Batteries dead? Remote broken? You can still control your Samsung TV's input selection using these seven alternative methods.

Method 1: Samsung SmartThings App (Recommended)

The SmartThings app on your smartphone provides complete remote functionality, including source/input selection.

Setup process:

1. Download SmartThings from the App Store (iOS) or Google Play (Android)

2. Ensure your phone and Samsung TV are on the same Wi-Fi network

3. Open SmartThings and tap the "+" icon

4. Select "Add Device" > "Samsung" > "TV"

5. Follow on-screen pairing instructions (you may need to enter a PIN displayed on your TV)

6. Once paired, tap your TV to access the virtual remote

Using SmartThings for input selection:

1. Tap "Remote" at the bottom of the TV control screen

2. Swipe to access additional buttons if needed

3. Tap the Source/Input button

4. Select your desired input

This method also helps when you need to set up Samsung TV without remote from scratch.

Method 2: Physical TV Controller Button

Every Samsung Smart TV has a physical controller button - though finding it can be tricky.

Button locations by TV series:

Using the controller:

1. Locate the button (check under the Samsung logo first)

2. Short press opens the menu

3. Use joystick movements (or repeated short presses on button-only models) to navigate

4. Select the Source icon

5. Navigate to your desired input

6. Long press or center click to confirm selection

For volume control using the same button, our guide on change volume without remote Samsung TV provides detailed instructions.

Method 3: Bixby Voice Commands

Samsung TVs with built-in microphones (2019 and newer) respond to Bixby voice commands for input control.

Using Bixby:

1. Say "Hi Bixby" to wake the assistant (or press and hold the microphone button on your remote if you have it)

2. Say "Change source to HDMI 1" or "Switch to HDMI 2"

3. Bixby confirms and switches the input

Alternative phrasings:

• "Switch input to HDMI 1"

• "Go to HDMI 2"

• "Select USB source"

• "Show source menu"

For comprehensive voice control setup, including more Samsung TV voice commands, Bixby offers surprisingly robust TV control.

Method 4: Amazon Alexa Voice Control

If you've linked your Samsung TV to Alexa through SmartThings:

Command format: "Alexa, switch [TV Name] to HDMI 1"

Setup requirement: Your Samsung TV must be connected to SmartThings, and the SmartThings skill must be enabled in the Alexa app.

Method 5: Google Assistant Voice Control

Similar to Alexa, Google Assistant can control Samsung TVs through SmartThings integration.

Command format: "Hey Google, change [TV Name] to HDMI 2"

Setup requirement: Link SmartThings to Google Home through the Google Home app's "Works with Google" device setup.

Method 6: HDMI-CEC Auto-Switch

Here's a workaround that uses Anynet+ to your advantage: if you enable HDMI-CEC and want to switch to a specific input, simply power on the device connected to that input. The TV automatically switches to that source.

This works best when:

• You want to switch TO a device (not away from it)

• The device supports HDMI-CEC

• Anynet+ is enabled on your TV with "Auto Turn On" active

Method 7: Universal Remote Setup

A universal remote provides permanent remote-free independence from Samsung's remote.

Programming steps:

1. Purchase a universal remote (most brands support Samsung TVs)

2. Find Samsung TV codes in the remote's manual (common codes: 0060, 0030, 0019, 0056, 0178)

3. Follow the remote's programming procedure

4. Test source/input functionality

For detailed instructions on how to sync universal remote to Samsung TV, the process varies by universal remote brand.

After getting a remote working again: Our comprehensive guide on Samsung TV remote functions helps you maximize your remote's capabilities, including shortcuts you may not know about.

Samsung TV Source Greyed Out or Missing: Causes and Solutions

When you open your Samsung TV's source menu and see HDMI inputs greyed out - visible but unselectable - the TV is telling you something important: it doesn't detect an active signal on those ports.

Why Inputs Appear Greyed Out (Normal Behavior)

Samsung TVs intentionally grey out inputs with no detected signal. This isn't a malfunction - it's a design choice to simplify the source menu by showing only active connections. The greyed-out option still appears so you know the port exists, but you can't select an "empty" input.

The key insight: Greyed-out inputs almost always indicate a problem with the connected device or cable, not the TV itself.

Cause 1: Device Not Powered On

Most common cause. Devices in standby, sleep, or hibernate mode don't output video signal. Your TV correctly reports no signal by greying out that input.

Fix: Ensure the external device is fully powered on (not in standby - solid power LED, not blinking).

Cause 2: HDMI Cable/Connection Issue

A loose or damaged cable prevents the TV from detecting device presence.

Fix: Reseat the HDMI cable firmly at both ends. Try a different cable if available.

Cause 3: Input Signal Plus Disabled

For 4K devices, disabled Input Signal Plus can prevent proper detection.

Fix: Enable Input Signal Plus for the affected HDMI port (Settings > General > External Device Manager > Input Signal Plus > Select port > ON).

Cause 4: Auto Source Detection Failure

Following firmware updates, Samsung's auto-detection sometimes glitches.

Fix: Power cycle the TV (unplug 30 seconds) and reconnect devices.

When Sources Completely Disappear

If ALL inputs vanish from the source menu (not just greyed but completely absent), this indicates a more serious software corruption issue.

Solutions:

1. Smart Hub Reset: Settings > Support > Device Care > Self Diagnosis > Reset Smart Hub (PIN: 0000)

2. Factory Reset: If Smart Hub reset fails (Settings > General & Privacy > Reset)

If a Samsung TV function not available error appears when trying to access source settings, Smart Hub reset typically resolves it.

Advanced Troubleshooting: Factory Reset and Firmware Updates

When basic troubleshooting fails, these advanced methods address deeper software issues. Always try firmware update before factory reset - updates often fix bugs without erasing your settings.

Check for Firmware Updates First

Samsung releases frequent firmware updates that patch known bugs, including input detection issues.

Update via Internet (OTA):

1. Ensure your TV is connected to the internet

2. Navigate to: Settings > Support > Software Update

3. Select "Update Now"

4. If an update is available, select "Yes" to install

5. The TV will download, install, and restart automatically

Update via USB (If TV Won't Connect to Internet):

1. Note your exact model number (Settings > Support > About This TV)

2. Visit Samsung's support website and download the firmware file for your specific model

3. Extract the downloaded file to a FAT32-formatted USB drive

4. Insert the USB into your TV's USB port

5. Navigate to: Settings > Support > Software Update > Update Now

6. The TV will detect and install the USB firmware

Smart Hub Reset (Preserves Most Settings)

Smart Hub Reset clears app data and accounts while preserving your picture, sound, and network settings. It's less disruptive than factory reset and often resolves software corruption issues.

Navigation: Settings > Support > Device Care > Self Diagnosis > Reset Smart Hub

Enter PIN when prompted (default: 0000). After reset, you'll need to re-download apps and sign in to streaming services.

Full Factory Reset

Factory reset should only be used when other methods fail. It erases everything.

Before you reset, document:

• Wi-Fi network name and password

• App login credentials (Netflix, Disney+, etc.)

• Picture and sound settings you've customized

• Channel favorites

Factory Reset procedure:

2023-2026 models: Settings > All Settings > General & Privacy > Reset > Enter PIN (0000) > Reset

2019-2022 models: Settings > General > Reset > Enter PIN > Reset

Older models: Settings > Support > Self Diagnosis > Reset

Forgot Your PIN?

Try the default PINs first: 0000 or 1234.

If those don't work, you can reset the PIN using a secret code:

1. Power off the TV completely

2. On your remote, press: Mute > 8 > 2 > 4 > Power

3. This resets the PIN to 0000

Post-Reset Setup

After factory reset, you'll walk through initial Samsung TV setup again:

1. Select language and region

2. Connect to Wi-Fi

3. Sign in to Samsung account

4. Configure picture and sound settings

5. Download and sign in to apps

If your TV becomes Samsung TV stuck on setup screen during this process, a power cycle usually allows you to restart the setup.

What Factory Reset Fixes (And Doesn't Fix)

Prevention Strategies: How to Avoid Samsung TV Input Problems

An ounce of prevention saves hours of troubleshooting. These seven practices significantly reduce input problem occurrences.

Tip 1: Use Certified HDMI Cables

Cheap, unbranded HDMI cables are the single most common cause of intermittent signal issues. For reliable 4K HDR performance, invest in cables with official HDMI certification.

Certification levels:

• High Speed HDMI: 10.2Gbps (adequate for 1080p, marginal for 4K)

• Premium High Speed HDMI: 18Gbps (recommended for 4K 60Hz HDR)

• Ultra High Speed HDMI: 48Gbps (required for 4K 120Hz, 8K)

Look for the official HDMI.org certification logo on the packaging - not just marketing claims of "4K compatible."

Tip 2: Enable Automatic Firmware Updates

Bug fixes arrive through firmware updates. Enable automatic updates to receive them without manual intervention.

Enable auto-update: Settings > Support > Software Update > Auto Update > ON

For the most stable update experience, consider using a Samsung TV ethernet connection rather than Wi-Fi - wired connections prevent the partial downloads that sometimes cause update issues.

Tip 3: Configure Anynet+ Intentionally

Don't leave Anynet+ in an ambiguous state. Either:

• Enable fully for convenient one-remote control (and accept occasional auto-switching)

• Disable completely for total input control (sacrifice convenience)

• Selectively configure by enabling Anynet+ but disabling Auto Turn On

The worst configuration: leaving Anynet+ "on" without understanding what it does, then being surprised by its behavior.

Tip 4: Use Proper Shutdown Procedures

Cutting power via surge protector toggle doesn't allow the TV to save settings properly. Always use:

• Remote power button

• TV controller button

• SmartThings app power control

This allows the TV to close processes and save configuration data correctly.

Tip 5: Label Your HDMI Cables

When troubleshooting, knowing which cable goes where eliminates confusion. Use cable labels or colored tape to identify:

• Which device connects to which HDMI port

• Which cables are certified for which capabilities

Tip 6: Monthly Power Cycle Maintenance

Even when everything works fine, a monthly power cycle clears accumulated cached data before it causes problems.

Monthly maintenance:

1. Unplug TV from wall

2. Wait 60 seconds

3. Plug back in

4. Resume normal use

This proactive approach prevents the memory buildup that eventually causes software glitches.

Tip 7: Avoid Frequent Hot-Plugging

Repeatedly connecting and disconnecting HDMI cables while devices are powered creates handshake failures and can eventually damage ports.

Best practice: Power off both the TV and device before connecting or disconnecting HDMI cables.

When to Contact Samsung Support (Hardware Failure Signs)

Some problems genuinely require professional service. Knowing when to stop DIY troubleshooting prevents wasted time and potential further damage.

Hardware Failure Indicators

Contact Samsung Support if you observe:

• Multiple HDMI ports failing simultaneously (all ports show "No Signal" regardless of device/cable)

• Physical damage visible (bent pins, burn marks, discoloration around ports)

• Burning smell when using HDMI connections

• Issues persist through factory reset (software elimination confirms hardware cause)

• TV completely unresponsive to any input method (buttons, remote, SmartThings)

• Visible picture distortion only on HDMI inputs (vertical lines, color banding)

When DIY Troubleshooting Ends

If you've completed ALL of the following without resolution, hardware failure is likely:

1. ✓ 30-second power cycle

2. ✓ Multiple cable tests (including known-good cables)

3. ✓ All HDMI ports tested

4. ✓ Multiple devices tested

5. ✓ Firmware updated

6. ✓ Smart Hub reset

7. ✓ Factory reset

At this point, continued troubleshooting won't help - you need professional diagnosis.

Samsung Warranty Information

Most Samsung TVs include:

• 1-year manufacturer warranty covering parts and labor for defects

• Extended warranty options available at purchase

Check warranty status:

• Visit samsung.com/us/support/warranty

• Use the Samsung Members app

• Call Samsung Support with your serial number

Contacting Samsung Support

Phone: 1-800-SAMSUNG (1-800-726-7864) Available 24/7 for support

Live Chat: samsung.com/support Real-time text-based support

Samsung Members App: In-app support with diagnostic data sharing

Information to gather before calling:

• Model number (Settings > Support > About This TV), or use our guide on Samsung TV model number lookup

• Serial number (same location or on TV back panel)

• Detailed problem description

• Troubleshooting steps already attempted

Samsung Remote Diagnostics

If your TV is internet-connected, Samsung technicians can remotely diagnose certain issues with your permission. During your support call, they may request remote access to:

• View diagnostic logs

• Check system settings

• Identify software issues

• Push targeted fixes

This requires your explicit consent and can only access diagnostic data - not personal information or viewing history.

FAQ: Samsung TV Input Source Problems Answered

Why can't I change the input source on my Samsung TV?

Samsung TV input changes may fail due to software glitches (fixed by 30-second power cycle), remote control issues (re-pair or replace batteries), Anynet+ conflicts (disable in External Device Manager), frozen source menu (requires restart), or hardware failure (needs professional service). Start with a power cycle, which resolves most cases.

Expanded answer: The most common cause is a temporary software glitch in Tizen OS. Unplug your TV for 30 seconds, then reconnect and test. If that fails, check your remote's battery level and Bluetooth pairing status. Third most common: Anynet+ (HDMI-CEC) sending conflicting commands - try disabling it in Settings > General > External Device Manager > Anynet+.

Why does my Samsung TV say 'No Signal' on HDMI?

Samsung TV displays "No Signal" on HDMI when the external device is off or in standby, HDMI cable is loose or damaged, wrong source is selected, HDMI port is faulty, Input Signal Plus is disabled (for 4K devices), or cable doesn't support required bandwidth. Check device power and reseat cables first.

Expanded answer: Work through these checks in order: (1) Verify your device is fully powered on, not in sleep mode. (2) Physically check cable connections at both ends. (3) Confirm you've selected the correct HDMI port number in the source menu. (4) For 4K devices, enable Input Signal Plus for that HDMI port. (5) Test with a different cable certified for your content type.

How do I change input on Samsung TV without remote?

Change Samsung TV input without remote: 1) Use SmartThings app on smartphone (connect same WiFi, add TV), 2) Press TV Controller button (bottom center or back right), 3) Use Bixby voice commands ("Switch to HDMI 1"), 4) Control via Alexa/Google Assistant, 5) Program a universal remote, 6) Enable HDMI-CEC auto-switching.

Expanded answer: The SmartThings app provides the most complete control - it replicates every remote function on your phone. For quick switching without phone setup, locate the TV Controller button (usually under the Samsung logo) and use short presses to navigate the on-screen menu to source selection.

How do I stop my Samsung TV from switching inputs automatically?

Stop Samsung TV auto-switching: 1) Go to Settings > General > External Device Manager > Anynet+ (HDMI-CEC) and disable "Auto Turn On," 2) Alternatively, disable Anynet+ entirely if you don't use device control features, 3) Check connected devices (PS5, Xbox, streaming sticks) and disable their CEC settings, 4) Set preferred startup input in Start Screen Options.

Expanded answer: Anynet+ (HDMI-CEC) is the culprit in nearly all auto-switching cases. The selective fix - disabling only "Auto Turn On" while keeping Anynet+ enabled - preserves one-remote control while stopping unwanted input switching. If problems persist, disable CEC on individual devices rather than on the TV.

Why are my Samsung TV HDMI inputs greyed out?

Samsung TV greys out HDMI inputs that don't detect an active signal - this is normal auto-detection behavior. To fix: verify external device is powered on (not in standby), reseat HDMI cables firmly at both ends, enable Input Signal Plus for 4K devices, or power cycle the TV for 30 seconds.

Expanded answer: Greyed-out inputs indicate the TV sees no signal on that port. This is almost always a device-side or cable issue, not a TV problem. Check that your device is fully powered (solid LED, not blinking standby indicator), then reseat the HDMI cable connections. For 4K devices, enable Input Signal Plus.

What is Anynet+ on Samsung TV?

Anynet+ is Samsung's implementation of HDMI-CEC (Consumer Electronics Control), allowing connected HDMI devices to communicate with your TV. It enables features like one-remote control of multiple devices and auto-switching when devices power on. Located in Settings > General > External Device Manager > Anynet+ (HDMI-CEC).

Expanded answer: HDMI-CEC is an industry standard; "Anynet+" is just Samsung's marketing name for it. The feature allows your Samsung remote to control volume on a connected soundbar, power on/off connected devices, and automatically switch inputs when a device turns on. It's convenient when working correctly but can cause unwanted behaviors when multiple devices send conflicting CEC commands.

Does factory reset fix Samsung TV input problems?

Factory reset often fixes Samsung TV input problems caused by software glitches, corrupted settings, or firmware bugs. However, it erases all settings and app data. Before factory resetting, try: power cycle (30 seconds unplugged), firmware update, and Smart Hub reset first. Factory reset won't fix hardware failures like damaged HDMI ports.

Expanded answer: Use factory reset as a last resort after exhausting less disruptive options. A firmware update often resolves the same issues without data loss. Smart Hub reset clears app-related corruption while preserving picture and sound settings. Only proceed to factory reset when other methods fail - and document your settings beforehand, as you'll need to reconfigure everything.

How do I set a default startup input on Samsung TV?

Set Samsung TV default startup input: 1) Go to Settings > General & Privacy > Start Screen Options, 2) Turn OFF "Start with Smart Hub Home," 3) Enable "Autorun Last App" to start on last-used input, 4) Alternatively, leave your preferred device on and enable Anynet+ so TV auto-switches when device powers up.

Expanded answer: Samsung TVs don't have a direct "default input" setting, but you can achieve the same result through Start Screen Options. Disabling Smart Hub Home and enabling Autorun Last App means the TV returns to whatever input you were last using. For a specific input every time, combine this with Anynet+ auto-switching from your preferred device.

How do I use Samsung TV physical buttons to change input?

Use Samsung TV physical buttons for input: 1) Locate TV Controller (bottom center, back panel right, or under Samsung logo), 2) Short-press center to open menu, 3) Navigate using joystick/directional buttons to Source icon, 4) Press center to select, 5) Navigate to desired input (HDMI 1, 2, etc.), 6) Press center to confirm.

Expanded answer: The TV Controller button location varies by model series. Check under the Samsung logo first - most 2020 and newer models place it there. The button typically functions as a joystick: tilt for navigation, press center for selection. Some older models have multiple discrete buttons instead of a joystick-style controller.

Why does my Samsung TV keep going to Samsung TV Plus?

Samsung TV defaults to Samsung TV Plus when no active input is detected or Smart Hub Home is enabled. To fix: ensure external device stays powered on, disable "Start with Smart Hub Home" in Settings > General & Privacy > Start Screen Options, and enable "Autorun Last App" to resume your previous input on startup.

Expanded answer: Samsung TV Plus is the TV's built-in free streaming service, and it's set as the default "home" screen on many Samsung TVs. When the TV powers on and doesn't detect an active HDMI signal, it falls back to Samsung TV Plus. The fix involves changing startup behavior in Start Screen Options and ensuring your preferred device remains powered and connected.

Conclusion: Your Samsung TV Input Problems Solved

Most Samsung TV input source problems trace back to software glitches, HDMI handshake issues, or Anynet+ configuration - all fixable at home without professional help.

The essential troubleshooting hierarchy:

Start with the 30-second power cycle. It resolves roughly 45% of all input issues with minimal effort. If that doesn't work, reseat your HDMI cables and verify you've selected the correct input source. For auto-switching problems, configure Anynet+ intentionally rather than leaving it in its default state. And for 4K devices, always enable Input Signal Plus on the HDMI ports they're connected to.

Save this guide - input problems tend to recur after firmware updates or when connecting new devices. Having a systematic troubleshooting approach ready prevents the frustration of random fix attempts.

When problems persist despite thorough troubleshooting, don't hesitate to contact Samsung Support. Hardware failures are rare but do occur, and warranty coverage often applies even outside the first year for manufacturing defects.

For comprehensive Samsung TV troubleshooting beyond input issues, the same systematic approach - identify symptoms, understand causes, apply targeted fixes - works across virtually every Samsung TV problem you'll encounter.