Mode Not Supported on Samsung TV: Complete Fix Guide [2026]

That dreaded "Mode Not Supported" message just appeared on your Samsung TV, and now you're staring at a blank screen instead of your favorite show. Take a breath - this is almost certainly fixable, and you probably won't need to call anyone for help.

I've seen this error frustrate countless Samsung TV owners, whether they're connecting a PS5, switching cable channels, or just trying to watch a Blu-ray. The good news? About 85% of these cases resolve within five minutes using the methods below. The error isn't a sign your TV is broken - it's a compatibility hiccup between your TV and whatever device you've connected.

This guide covers every scenario I've encountered: gaming consoles that won't display, cable boxes that suddenly stop working, streaming devices acting up, and those mysterious cases where the error appears out of nowhere. We'll start with quick fixes that work most often, then dive into device-specific solutions if you need them.

Quick Fixes for "Mode Not Supported" on Samsung TV

Before diving into complex troubleshooting, try these five methods first. They resolve the majority of "mode not supported" errors, often in under two minutes.

1. Power Cycle Both Devices (Success Rate: ~40%)

Unplug your Samsung TV from the wall outlet - not just the power strip. Wait 60 full seconds. While waiting, also unplug the device causing the error (cable box, game console, streaming stick). Plug the TV back in first, wait for it to fully boot, then reconnect your external device.

This clears temporary data that can cause HDMI handshake failures. It's the single most effective quick fix.

2. Switch to a Different HDMI Port (Success Rate: ~25%)

Move your HDMI cable to another port on your Samsung TV. If you're currently in HDMI 1, try HDMI 2 or 3. Remember to change your TV's input source to match the new port.

Different HDMI ports sometimes have different capabilities - especially on older Samsung models where only certain ports support full 4K or HDR signals.

3. Test with a Different HDMI Cable (Success Rate: ~20%)

Swap your current HDMI cable for another one, preferably shorter and certified High Speed. Cables degrade over time, and longer cables (over 10 feet) are more prone to signal issues with high-bandwidth content like 4K.

4. Change the Source Device's Resolution to 1080p (Success Rate: ~30%)

If possible, access your external device's settings and manually set the output resolution to 1080p at 60Hz. This often bypasses incompatibility issues while you troubleshoot further.

For devices you can't access the menu on (because the screen is blank), check the device-specific sections below for blind navigation or safe mode instructions.

5. Perform a Cold Boot on Your Samsung TV (Success Rate: ~15%)

Hold the power button on your Samsung TV remote for 10 seconds until the TV restarts. This is different from a regular power off - it forces a complete system restart and clears cached display data.

If the error just started appearing, a cold boot often resolves intermittent HDMI handshake issues without changing any settings.

When Quick Fixes Don't Work

If these methods didn't solve your problem, don't worry. The error likely stems from a specific configuration issue with your device. Use the diagnostic section below to identify the root cause, then jump to the relevant device-specific section. For comprehensive Samsung TV troubleshooting, you may also want to bookmark our main guide.

What Does "Mode Not Supported" Mean on Samsung TV?

"Mode Not Supported" on Samsung TV means your television is receiving a video signal it cannot display. The signal's resolution, refresh rate, or format falls outside what your specific Samsung model can process.

Think of it like trying to play a Blu-ray in a DVD player. The disc contains data, but the player lacks the hardware to read it properly. Your Samsung TV recognizes that something is coming through the HDMI cable, but the signal characteristics don't match its supported specifications.

The Four Main Causes:

• Resolution mismatch: Your device outputs 4K, but your TV only supports 1080p, or the specific 4K format isn't compatible

• Refresh rate incompatibility: The source sends 120Hz, but your TV or HDMI port maxes out at 60Hz

• HDMI handshake failure: The TV and device fail to "agree" on display parameters during their initial communication

• Cable bandwidth limitations: Your HDMI cable cannot transmit the required data for high-resolution, high-refresh-rate content

What This Error Is NOT:

This message doesn't indicate hardware failure, a defective TV panel, or damage to your television. Your Samsung TV is functioning exactly as designed - it's telling you the incoming signal needs adjustment.

Samsung TV Supported Resolutions:

Most Samsung TVs from 2020-2026 support these standard resolutions:

If you're seeing this error, your external device is likely outputting a signal not listed above, or there's a communication breakdown preventing proper signal negotiation. Understanding your Samsung TV picture settings can also help you identify display configuration issues.

How to Diagnose "Mode Not Supported" Error on Samsung TV

Before trying random fixes, spend two minutes identifying where the problem actually lies. This prevents wasted effort and points you directly to the right solution.

Step 1: Determine If This Is a New Issue or Ongoing

Did the device work properly before, or has it never displayed correctly on this TV? If it worked before, something changed - a firmware update, a settings adjustment, or a cable that shifted. If it's a new connection that never worked, you're likely dealing with a compatibility or configuration issue.

Step 2: Test the Device on Another Display

Connect your problematic device (gaming console, cable box, etc.) to a different TV if available. If it works there, the issue is TV-side or cable-related. If the same error appears, the problem is with the device's output settings.

Step 3: Test a Different Device on the Same HDMI Port

Connect something else - a streaming stick, Blu-ray player, or laptop - to the HDMI port showing the error. If the second device works fine, your original device needs configuration changes. If nothing works on that port, you may need to reset HDMI ports Samsung TV or the port itself may have issues.

Step 4: Run Samsung's Built-In HDMI Cable Test

Navigate to Settings > Support > Device Care > Self Diagnosis > Signal Information > HDMI Cable Test. This diagnostic tells you whether your cable can handle the bandwidth your connected device requires.

If the test fails, replace your cable with a certified High Speed HDMI cable (for 4K 60Hz) or Ultra High Speed HDMI 2.1 cable (for 4K 120Hz gaming).

Step 5: Check for Pattern Recognition

• Error on ALL HDMI ports with ALL devices = TV software issue (try firmware update or factory reset)

• Error on ONE port only = potential port damage or port-specific setting

• Error with ONE device only = device configuration issue

• Error ONLY on certain channels = cable box resolution switching issue

• Error AFTER firmware update = settings reset, reconfiguration needed

Diagnostic Quick Reference:

If your Samsung TV suddenly shows the error when it worked fine previously, this often indicates an HDMI handshake issue that a power cycle or Samsung HDMI connection reset resolves. Don't mistake this for a Samsung TV no signal problem - "no signal" means no data is being received, while "mode not supported" means data is arriving but can't be processed.

Fix Samsung TV Mode Not Supported: Resolution & Refresh Rate Issues

Resolution mismatches cause the majority of "mode not supported" errors. Your external device is sending a video signal your Samsung TV cannot process - either the resolution is too high, the refresh rate is unsupported, or the specific combination doesn't match your TV's capabilities.

Understanding Resolution Output

Every device connected to your TV outputs video at a specific resolution and refresh rate. When these don't match what your Samsung TV accepts, you see the error. The challenge: you often can't see the screen to change settings.

How to Check Your Device's Current Output:

• Cable Box: Press the INFO button on your remote; the resolution usually displays on-screen (if visible) or on the box's front display

• PlayStation 5: Settings > Screen and Video > Video Output Information

• Xbox Series X: Settings > General > TV & Display Options > 4K TV Details

• Windows PC: Right-click desktop > Display Settings > Resolution

• Mac: System Preferences > Displays

Adjusting Resolution When You Can't See the Screen:

This is the tricky part. If your screen is completely black, try these blind navigation techniques:

For most cable boxes: Press EXIT three times, then press 7-2-0 on your remote. This forces 720p output on many providers' equipment.

For PS5: Power off completely, then hold the power button for 7 seconds until you hear a second beep. This boots into Safe Mode. Select option 2 (Change Video Output) > Change Resolution > select 1080p.

For Xbox: Turn off the console, then hold both the Power and Eject buttons simultaneously for 10 seconds during startup. This resets video to 640x480, allowing you to reconfigure.

Samsung TV Picture Size Settings:

Access these settings to ensure your TV accepts the widest range of inputs:

Settings > Picture > Picture Size Settings

Options include:

• 16:9 Standard: Best for most content

• Auto: Automatically adjusts to source (recommended)

• Fit to Screen: Prevents overscan issues

• Custom: Manual adjustment

For 2020-2026 Samsung models, you can also access Picture Size by pressing the P.SIZE button if your remote has one, or navigating through Settings > Picture > Picture Size.

When Resolution Seems Correct But Error Persists:

The issue might be refresh rate rather than resolution. A device outputting 4K at 120Hz to a TV that only supports 4K at 60Hz will trigger this error. Similarly, some older Samsung TVs don't support 1080p at 24Hz (common for Blu-ray playback).

Check your device's settings for refresh rate or frame rate options. Setting to 60Hz resolves most compatibility issues. For optimal display quality after resolving resolution issues, review your Samsung TV image configuration settings.

If you're setting up a new Samsung TV and experiencing resolution issues from the start, the Samsung TV initial configuration process may not have detected your devices correctly.

Resolution Support by Samsung TV Category:

Samsung TV HDMI Mode Not Supported: Cable & Port Troubleshooting

HDMI problems cause a significant portion of "mode not supported" errors. Understanding how HDMI connections work helps you troubleshoot effectively.

How HDMI Handshakes Work:

When you connect a device to your Samsung TV via HDMI, both perform a "handshake." During this negotiation, they exchange information about supported resolutions, refresh rates, HDR capabilities, and copy protection (HDCP). If anything goes wrong during this process, you get the "mode not supported" message.

HDMI Cable Types and Their Limitations:

Not all HDMI cables are equal. Using the wrong cable for your content requirements guarantees problems.

Can a Bad HDMI Cable Cause "Mode Not Supported"?

Yes. If your cable cannot transmit the bandwidth your device outputs, the TV displays this error. You might have a 4K 120Hz-capable TV and console, but a cheap cable bottlenecks the connection, causing the handshake to fail.

Use Samsung's built-in cable test: Settings > Support > Device Care > Self Diagnosis > Signal Information > HDMI Cable Test.

Cable Length Matters:

Longer cables = more signal degradation. For passive HDMI cables:

• Under 6 feet: Reliable for all resolutions

• 6-10 feet: Good for 4K 60Hz

• 10-15 feet: May struggle with 4K 120Hz

• Over 15 feet: Consider active cables or fiber optic HDMI

If you need longer runs for 4K 120Hz gaming, fiber optic HDMI cables maintain signal integrity over distances up to 100 feet.

Port-Switching Troubleshooting Sequence:

1. Test HDMI 1 with your device

2. If it fails, try HDMI 2

3. Note which ports work and which don't

4. Check Input Signal Plus settings for each port (some Samsung TVs have different capabilities per port)

On many Samsung TVs (especially 2020-2022 models), HDMI 1 and 2 offer full HDMI 2.1 support while HDMI 3 and 4 are limited to HDMI 2.0 specifications. Gaming at 4K 120Hz requires ports with full HDMI 2.1 capability.

When Multiple Ports Fail:

If you're having trouble across multiple ports, you may need to refresh Samsung HDMI inputs through a settings reset. Sometimes a factory reset of HDMI-related settings resolves persistent handshake failures.

Also verify there isn't a no input detected Samsung issue, which presents differently from "mode not supported" but can have similar root causes.

Samsung TV Mode Not Supported with Gaming Consoles (PS5, Xbox, Switch)

Gaming consoles are the most common source of "mode not supported" errors on Samsung TVs. Modern consoles output high-bandwidth signals that require specific TV configurations - and when those configurations aren't right, you get a blank screen.

PlayStation 5 Troubleshooting

The PS5 and Samsung TVs have a documented history of HDCP handshake issues. Sony and Samsung use slightly different implementations of HDCP 2.3, leading to authentication failures that display as "mode not supported."

PS5 Safe Mode Resolution Reset (When Screen Is Black):

1. Turn off your PS5 completely (not rest mode)

2. Press and hold the power button until you hear TWO beeps (about 7 seconds)

3. Connect your controller via USB cable

4. Press the PS button on the controller

5. Select "Change Video Output" > "Change Resolution"

6. Choose 1080p initially, then increase once connection stabilizes

Disable HDCP on PS5:

This single setting resolves most Samsung TV + PS5 connection issues:

Settings > System > HDMI > Enable HDCP > Toggle OFF

Important caveat: With HDCP disabled, you cannot play Blu-ray discs or use certain streaming apps that require copy protection. You'll need to re-enable HDCP for those activities.

Adjust 4K Video Transfer Rate:

If you get a signal but see flickering or artifacts:

Settings > Screen and Video > Video Output > 4K Video Transfer Rate > Set to -1 or -2

This reduces the data transfer rate slightly, improving handshake reliability with Samsung TVs that struggle at full bandwidth.

Samsung TV Settings for PS5:

• Enable Input Signal Plus for your PS5's HDMI port (Settings > General > External Device Manager > Input Signal Plus)

• Turn ON Game Mode (Settings > General > External Device Manager > Game Mode Settings)

• Ensure your PS5 is connected to an HDMI 2.1 port (typically HDMI 1 or 2)

You'll need to access your Samsung TV input settings to configure Input Signal Plus for the correct port.

If your game mode keeps turning off after enabling it, there may be a conflict with other settings - check our dedicated guide for that specific issue.

Xbox Series X/S Troubleshooting

Xbox consoles generally have better Samsung TV compatibility than PlayStation, but issues still occur - especially around VRR (Variable Refresh Rate) and 4K 120Hz modes.

Xbox Low Resolution Boot (When Screen Is Black):

1. Turn off the Xbox completely

2. Press and hold BOTH the Power button AND the Eject button

3. Keep holding for 10-15 seconds through the startup

4. The console boots at 640x480, allowing you to reconfigure

Xbox Display Settings Path:

Settings > General > TV & Display Options

From here you can adjust:

• Resolution (try 1080p first, then 4K)

• Refresh rate (60Hz is most compatible)

• HDR (turn off if experiencing issues)

• Video modes (disable 4K 120Hz VRR initially)

VRR Troubleshooting:

Variable Refresh Rate improves gaming smoothness but causes handshake failures on some Samsung TV models. If you experience intermittent black screens or "mode not supported" errors during gameplay:

Settings > General > TV & Display Options > Video modes > Disable "Allow Variable Refresh Rate"

You can re-enable it after updating both your TV firmware and Xbox system software.

Nintendo Switch Troubleshooting

The Switch rarely causes "mode not supported" errors since it outputs at lower resolutions, but dock issues can trigger problems.

Switch TV Settings:

System Settings > TV Settings > TV Resolution > Set to Automatic or 1080p

If "Automatic" causes issues, manually selecting 1080p or 720p usually resolves them. The Switch doesn't output 4K, so resolution mismatches aren't typically the culprit - HDMI handshake failures from the dock are more common.

Recommended Samsung TV Settings for All Consoles:

HDMI-CEC (called Anynet+ on Samsung) can cause conflicts with gaming consoles. If you're having issues, try disabling it temporarily. This also affects devices like Firestick not working Samsung TV situations where CEC causes input conflicts.

Fix Mode Not Supported on Samsung TV with Cable Box (Xfinity, Spectrum, DirecTV)

Cable boxes are notorious for "mode not supported" errors because they automatically switch output resolutions based on channel content. When you flip from an HD channel to an SD channel, the box may output a signal your TV momentarily can't process - triggering the error.

Xfinity/Comcast X1 Box Troubleshooting

Quick Resolution Reset (Exit-Exit-Exit-720):

This button sequence forces your Xfinity box to output at 720p, bypassing most compatibility issues:

Press EXIT > EXIT > EXIT > 720 on your Xfinity remote

The screen should return immediately at 720p resolution. From there, you can adjust to a higher resolution.

Change Xfinity Box Resolution Manually:

Press the Xfinity button > Settings gear icon > Device Settings > Video Display

Select your preferred resolution. For Samsung TVs, 1080i or 1080p produces the most reliable results. Avoid "Auto" or "Native" settings if you're experiencing intermittent errors - these cause the box to switch resolutions based on content, which can confuse HDMI handshakes.

Disable HDMI-CEC on Xfinity Box:

Some Xfinity X1 boxes conflict with Samsung's Anynet+ (HDMI-CEC) feature:

Xfinity button > Settings > Device Settings > HDMI-CEC > Disable

Also disable Anynet+ on your Samsung TV temporarily to test: Settings > General > External Device Manager > Anynet+ (HDMI-CEC) > OFF

After resolving the mode issue, you can pair Xfinity remote Samsung TV for integrated control.

Spectrum Cable Box Troubleshooting

Spectrum Resolution Reset:

Menu > Settings > System > Display > Video Output Resolution

Select 1080i or 1080p and choose "Apply." If your screen is blank, try navigating blindly:

Press MENU, then DOWN arrow twice, ENTER, DOWN arrow three times, ENTER, then use LEFT/RIGHT arrows to change resolution, and press ENTER to confirm.

Power Cycle Sequence for Spectrum:

1. Unplug the Spectrum cable box (wait 30 seconds)

2. Unplug the Samsung TV (wait 60 seconds)

3. Plug in the Samsung TV first - let it boot completely

4. Plug in the Spectrum box

This sequence often resolves handshake issues because it forces a clean HDMI negotiation.

DirecTV/DirecTV Stream Troubleshooting

DirecTV Receiver Resolution:

Menu > Settings > Display > Video > Video Resolution

Set to 1080p and disable "Native" mode. Native mode causes the receiver to output at the resolution of each channel, which triggers mode errors when switching between HD and SD content.

Universal Cable Box Tips (All Providers):

1. Always set a fixed output resolution - avoid "Auto" or "Native" settings that cause resolution switching

2. Use HDMI directly to TV - avoid receivers or soundbars in the chain if troubleshooting

3. The proper power-on sequence: TV first, cable box second

4. Check for firmware updates on your cable box - providers push updates that fix compatibility issues

If your Samsung TV channels not working only on certain channels while others display fine, the issue is definitely resolution-related - those problematic channels are outputting at a resolution or refresh rate your current configuration can't handle.

For Dish Network users, the process is similar - and you can sync Dish remote to Samsung TV after resolving display issues.

Streaming Device Mode Not Supported Fixes (Roku, Fire Stick, Chromecast)

Streaming devices occasionally trigger "mode not supported" errors, particularly when their auto-resolution features select incompatible output modes.

Roku Troubleshooting

Roku Display Settings:

Settings > Display type

Options include Auto detect, 4K UHD, 1080p, and 720p. If Auto detect causes problems, manually select 1080p.

Roku HDMI Mode:

Settings > System > Advanced system settings > HDMI mode

Set to "HDMI 2.0" for most Samsung TVs. Some older Roku models default to incompatible modes. Note that you can also access Samsung TV Plus on Roku as an alternative streaming option if certain apps cause display issues.

Amazon Fire TV/Fire Stick Troubleshooting

Fire devices aggressively switch between 4K and 1080p based on content, which can trigger mode errors on Samsung TVs.

Fire TV Display Settings:

Settings > Display & Sounds > Display > Video Resolution

Select 1080p 60Hz for maximum compatibility. You can try higher resolutions once stable.

Disable Match Original Frame Rate:

Settings > Display & Sounds > Match Original Frame Rate > OFF

This feature changes refresh rates to match content (24fps for movies, 60fps for shows), but the constant switching causes handshake failures on some Samsung TVs.

If network connectivity issues compound your streaming device problems, you can connect Samsung TV mobile hotspot as a temporary solution while troubleshooting.

If you continue having issues, we have a comprehensive guide for troubleshoot Firestick Samsung TV problems.

Chromecast Troubleshooting

Chromecast resolution is controlled by the casting device (phone, tablet, computer), not the Chromecast itself.

Adjust Chromecast Resolution via Google Home:

1. Open Google Home app

2. Select your Chromecast device

3. Tap the gear icon (Settings)

4. Select "Video" > "Ambient mode video quality"

For the Chromecast with Google TV, you can access display settings directly on the device.

Apple TV Troubleshooting

Apple TV Video Settings:

Settings > Video and Audio > Format

Select 4K SDR or 1080p SDR as a baseline. Avoid 4K HDR until the basic connection stabilizes.

Disable Match Content Features:

Settings > Video and Audio > Match Content

Turn OFF both "Match Dynamic Range" and "Match Frame Rate" temporarily. These features cause frequent resolution changes that can trigger mode errors.

HDMI 2.1 and 4K/120Hz Mode Not Supported Issues on Samsung TV

If you're trying to achieve 4K at 120Hz for gaming - and getting "mode not supported" - you're hitting the most bandwidth-demanding video mode available. Everything must be configured correctly.

What Input Signal Plus Does:

Input Signal Plus (called "HDMI UHD Color" on pre-2019 Samsung TVs) expands the HDMI input's bandwidth capability. Without it enabled, your Samsung TV limits the HDMI port to lower-bandwidth signals, blocking 4K 120Hz and high-quality HDR.

Enable Input Signal Plus:

Settings > General > External Device Manager > Input Signal Plus

Turn it ON for each HDMI port you're using with high-bandwidth devices. You must enable it per-port - it doesn't apply globally.

Which Samsung TV Ports Support Full HDMI 2.1?

Not all HDMI ports on your Samsung TV offer the same capabilities:

Check your specific model's specifications to confirm which ports support the full feature set.

4K 120Hz Requirements Checklist:

• [ ] Samsung TV with HDMI 2.1 port

• [ ] Device connected to correct HDMI port (usually HDMI 1 or 2)

• [ ] Input Signal Plus enabled for that port

• [ ] Ultra High Speed HDMI 2.1 cable (48 Gbps rated)

• [ ] Source device outputting 4K 120Hz

• [ ] Game Mode enabled (for gaming)

VRR (Variable Refresh Rate) Configuration:

VRR is a subset of HDMI 2.1 that allows smoother gaming by syncing the display refresh to the game's frame rate. However, VRR can cause handshake issues.

Game Mode Settings > VRR > Enable

If enabling VRR causes "mode not supported" or black screens, try these steps:

1. Disable VRR on both TV and console

2. Establish stable 4K 120Hz connection without VRR

3. Update both TV and console firmware

4. Re-enable VRR after updates

You can also explore different Samsung picture mode options to see if certain picture modes have better compatibility with your gaming setup.

If Samsung game mode automatically disables when you're trying to use these features, there's a conflict worth investigating separately.

When Input Signal Plus Causes Problems:

Some older devices don't work well with Input Signal Plus enabled - they require the lower-bandwidth HDMI mode. If enabling Input Signal Plus for a specific port causes that device to stop working:

1. Disable Input Signal Plus for that port

2. Use a different port with Input Signal Plus enabled for high-bandwidth devices

3. Connect the problematic device to a port without Input Signal Plus

For network stability with bandwidth-intensive gaming and streaming, a wired internet for Samsung TV connection often provides better results than Wi-Fi.

Samsung TV Advanced Troubleshooting: Firmware Updates & Factory Reset

When basic troubleshooting doesn't resolve the "mode not supported" error, software-level solutions may be necessary. These take more time but address deeper configuration issues.

Firmware Update Procedure

Outdated firmware causes many compatibility issues with newer devices. Samsung regularly releases updates that improve HDMI handshake reliability.

Automatic Update (If TV Connects to Internet):

Settings > Support > Software Update > Update Now

The TV checks Samsung's servers and downloads any available updates. This process takes 5-15 minutes depending on update size and connection speed. You can also update Samsung TV to latest version using USB if your TV lacks internet connectivity.

Enable Auto-Updates:

Settings > Support > Software Update > Auto Update > ON

With auto-updates enabled, your TV downloads and installs updates during standby hours, keeping you current without manual intervention.

USB Update (For TVs Without Internet):

1. On a computer, visit samsung.com/support

2. Search for your TV model number

3. Download the latest firmware file

4. Extract/unzip the downloaded file

5. Copy the extracted folder to a FAT32-formatted USB drive (root directory, not inside another folder)

6. Insert the USB into your Samsung TV

7. Navigate to Settings > Support > Software Update > Update Now

8. The TV detects the USB and offers to install

For detailed instructions on all update methods, see our complete Samsung TV firmware update guide.

Cold Boot Procedure

A cold boot is more thorough than a simple restart. It clears cached data that a regular power-off doesn't touch.

Remote Cold Boot:

Hold the power button on your Samsung remote for 10 seconds until the TV restarts. You'll see the Samsung logo as it boots fresh.

Power Cycle Cold Boot:

1. Turn off the TV using the remote

2. Unplug the TV from the wall outlet

3. Wait 2 full minutes (this allows capacitors to fully discharge)

4. Press and hold the physical power button on the TV for 5 seconds (drains residual power)

5. Plug the TV back in and turn it on

This procedure resolves HDMI handshake data that has become corrupted or stuck in an error state.

Smart Hub Reset

If apps are behaving strangely alongside HDMI issues, resetting the Smart Hub clears app-related data without affecting your picture settings.

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

Enter PIN when prompted (default is 0000).

This resets all app logins and Smart Hub settings. You'll need to sign back into Netflix, Disney+, and other streaming apps. Before resetting, you may want to close apps on Samsung TV that might be causing conflicts.

Factory Reset (Last Resort)

A factory reset erases everything - WiFi passwords, app logins, picture settings, and all customizations. Only use this after other methods fail.

Settings > General > Reset

Enter PIN when prompted (default is 0000).

Before Factory Reset:

• Note your picture settings (Brightness, Contrast, Backlight values)

• Record your WiFi password

• Understand you'll need to re-setup everything

• Confirm you've tried all other troubleshooting steps

After a factory reset, some users encounter a Samsung initial setup freeze during the configuration process - if this happens, consult our specific guide.

If your TV becomes completely Samsung TV not responding during any of these processes, a forced power cycle usually recovers it.

Samsung TV Settings to Fix Mode Not Supported Error

Several Samsung TV settings directly affect HDMI compatibility. Adjusting these can resolve persistent "mode not supported" errors without requiring device-side changes.

Picture Size Settings

Settings > Picture > Picture Size Settings

If content appears stretched or cut off alongside mode errors, switching to "Fit to Screen" or "Auto" often resolves both issues.

Anynet+ (HDMI-CEC) Configuration

Settings > General > External Device Manager > Anynet+ (HDMI-CEC)

HDMI-CEC allows devices to communicate and control each other. However, it causes conflicts with some devices - particularly gaming consoles and older cable boxes.

If you're experiencing mode errors, try disabling Anynet+ temporarily:

1. Turn OFF Anynet+ (HDMI-CEC)

2. Test your problematic device

3. If it works, leave Anynet+ off for that setup

4. If no improvement, re-enable Anynet+ (it's useful for other features)

Game Mode Settings Deep Dive

Settings > General > External Device Manager > Game Mode Settings

Game Mode reduces input lag by bypassing picture processing. However, it also changes how your TV handles incoming signals.

• Game Mode ON: Lower latency, less picture processing, may improve HDMI compatibility

• Game Mode OFF: Full picture processing, higher latency, different signal handling

Some users find mode errors only occur with Game Mode on - others only with it off. Test both states with your problematic device.

Aspect Ratio Adjustments for 4:3 Content

If you're connecting older devices (DVD players, retro gaming consoles) that output 4:3 content:

Settings > Picture > Picture Size Settings > 4:3 Screen Size

Choose whether to display with pillarboxes (black bars on sides) or stretch to fill. Forcing widescreen display of 4:3 content sometimes triggers mode errors on Samsung TVs.

For complete display optimization, our Samsung TV visual settings guide covers every option available. You might also want to configure your Samsung TV audio configuration after resolving video issues.

How to Prevent "Mode Not Supported" Errors on Samsung TV

Once you've fixed the immediate problem, these practices prevent future occurrences.

Enable Automatic Firmware Updates:

Settings > Support > Software Update > Auto Update > ON

Firmware updates often include HDMI compatibility improvements. Automatic updates ensure you always have the latest fixes.

Use the Correct Power-On Sequence:

Always turn on your Samsung TV first, wait 10 seconds for it to fully boot, then power on your connected device. This allows the TV to be ready to receive and properly negotiate the HDMI signal.

Cable Management Best Practices:

• Avoid bending HDMI cables at sharp angles near the connector

• Don't let cables hang unsupported (the weight stresses the port)

• Use cable ties to prevent accidental pulling

• Keep HDMI connections accessible for troubleshooting

Invest in Quality HDMI Cables:

Cheap cables work until they don't. For 4K 60Hz content, use Premium High Speed certified cables. For 4K 120Hz gaming, use Ultra High Speed HDMI 2.1 cables from reputable manufacturers.

Use Surge Protection:

Power surges can damage HDMI circuitry in both TVs and connected devices, leading to handshake issues. Connect your entertainment center to a quality surge protector.

Monthly Maintenance Checklist:

• [ ] Check for Samsung TV firmware updates

• [ ] Check for device firmware updates (console, cable box, streaming device)

• [ ] Verify all HDMI connections are secure

• [ ] Perform a cold boot if performance seems sluggish

If your Samsung TV experiences Samsung TV buffering problems or feels sluggish in addition to periodic mode errors, regular cache clearing helps - see our guide on how to clear cache on Samsung TV.

General performance issues? Check our guide on how to speed up slow Samsung TV performance.

When to Contact Samsung Support or Get Professional TV Repair

Sometimes the problem isn't software-configurable. Here's how to know when professional help is needed.

Hardware Failure Indicators:

• "Mode not supported" appears on ALL devices across ALL HDMI ports

• Visible damage to HDMI ports (bent pins, physical damage)

• Error accompanied by visual artifacts, lines, or discoloration

• TV was dropped, exposed to liquid, or experienced power surge

• Error persists even after factory reset

Samsung Support Contact Information:

• Phone: 1-800-SAMSUNG (1-800-726-7864)

• Website: samsung.com/us/support

• Samsung Members App: Live chat and remote diagnostics

• In-person: Samsung Experience Stores (major cities)

What Samsung Warranty Covers:

Standard Samsung TV warranty: 1 year from purchase date

Covers:

• Manufacturing defects

• Hardware failures under normal use

• Software issues when no user modification occurred

Does NOT cover:

• Physical damage

• Surge/lightning damage (unless through covered surge protector)

• Issues from unauthorized modifications

Professional Repair Cost Expectations:

Repair vs. Replace Decision:

Consider repair if:

• TV is less than 3 years old

• Repair cost is less than 50% of replacement value

• TV has features you specifically need

Consider replacement if:

• TV is more than 5 years old

• Repair cost exceeds 50% of replacement value

• Multiple components are failing

For testing port functionality, you can try connecting to the Samsung TV USB port to verify the TV's general connectivity features are working.

FAQ: Samsung TV Mode Not Supported Common Questions

Why does my Samsung TV say mode not supported?

Your Samsung TV displays "Mode Not Supported" when the connected device sends a video signal with incompatible resolution, refresh rate, or format. Common causes include resolution mismatch between your cable box, gaming console, or streaming device and your TV's supported input specifications. The error indicates a fixable compatibility issue, not a TV defect.

Can a bad HDMI cable cause mode not supported?

Yes. If your HDMI cable cannot transmit the required bandwidth for your content's resolution and refresh rate, your TV displays this error. Use Samsung's built-in HDMI Cable Test (Settings > Support > Device Care > Self Diagnosis > Signal Information) to verify cable quality. For 4K 60Hz content, use Premium High Speed cables. For 4K 120Hz gaming, Ultra High Speed HDMI 2.1 cables are required.

Why does mode not supported appear only on certain channels?

This typically indicates your cable box is set to "Auto" or "Native" resolution output. When you switch channels, the box outputs different resolutions based on each channel's broadcast format. Some channels broadcast at 1080i, others at 720p, and this switching triggers HDMI renegotiation that fails. Set your cable box to a fixed output resolution (1080p recommended) to prevent this.

Will a factory reset fix mode not supported permanently?

A factory reset can fix software-related causes of "mode not supported" errors but won't resolve hardware issues like damaged HDMI ports or external device configuration problems. Try less drastic solutions first - power cycling, cable replacement, and device settings adjustments resolve most cases. Reserve factory reset for situations where multiple devices fail on all ports.

How do I know if my HDMI port is damaged?

Test multiple devices on the suspect port and test the same device on other ports. If only one specific port fails with multiple devices while other ports work fine, that port may be damaged. Visual signs include bent pins inside the port, loose-feeling connections, or discoloration. Samsung's HDMI test can also indicate port issues when it reports cable problems with known-good cables.

What resolution should I set my cable box to for Samsung TV?

Set your cable box to 1080p for best compatibility with all Samsung TVs. Avoid "Auto" or "Native" settings, which cause the box to switch resolutions based on channel content - this switching is the primary cause of mode errors with cable boxes. Fixed 1080p output works for all content types and eliminates resolution-switching issues.

Does mode not supported mean my TV is broken?

No. This error indicates a signal compatibility issue between your TV and the connected device. The vast majority of "mode not supported" cases are resolved through settings adjustments on either the TV or the source device. Hardware failure is rare and usually accompanied by additional symptoms like visual artifacts, physical port damage, or errors appearing on every device and every port.

Why does my gaming console work on other TVs but not my Samsung?

Your Samsung TV may require Input Signal Plus enabled for the console's HDMI port, or the console may be outputting a resolution or refresh rate your specific Samsung model doesn't support on that particular port. Enable Input Signal Plus (Settings > General > External Device Manager > Input Signal Plus), use an HDMI 2.1-capable port for 4K 120Hz gaming, and verify the console's video output settings match your TV's capabilities.

This guide covers troubleshooting for Samsung Smart TVs from 2020-2026, including Crystal UHD, QLED, Neo QLED, and OLED models. Menu paths may vary slightly by model year and firmware version.