- TVs
- Smart TV
Unsupported Mode
LG TV: Unsupported Mode message when connecting a computer
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
On LG TVs, an Unsupported Mode message while connected to a PC means the computer is sending a resolution or refresh rate the TV cannot display on that input, or the PC graphics driver is outputting an invalid signal. Set a supported display mode in Windows or restore it via Windows Safe Mode.
Safety first
Stop and check this first
- Do not repeatedly change random settings when the PC screen is not visible on the TV; use Windows Safe Mode to restore a compatible resolution, and save your work before forcing shutdowns to enter Windows Recovery so unsaved data is not lost.
Safe checks you can perform
- Confirm the TV input selection and Windows Project display mode
- Set Display resolution to the Recommended option in Windows
- Start Windows in Safe Mode if the PC screen is not visible
Leave these tasks to a qualified professional
- Do not attempt this professional task: Update or reinstall the PC graphics driver and verify supported modes
- Do not attempt this professional task: Contact LG Electronics Support or the PC manufacturer for service
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Update or reinstall the PC graphics driver and verify supported modes
What they doIf changing the resolution still leaves Unsupported Mode on screen, try a different supported resolution and refresh rate from the TV user manual, then update or reinstall the PC graphics driver.
They must show youthe active PC output resolution and refresh rate matched against the supported resolution list in the LG TV manual.
In writingthe graphics driver version installed, the resolution and refresh rate applied, and the TV input tested.
Contact LG Electronics Support or the PC manufacturer for service
What they doIf the steps above do not resolve the issue after testing a compatible PC output mode without adapters, LG advises visiting the LG Electronics Support website to chat with the virtual assistant or schedule a service repair.
They must show youthe test results using a verified compatible PC resolution and inspection of the TV input port.
In writingthe LG TV model number, the PC display settings tested, and any out-of-warranty service fee terms before an engineer visit.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Confirm the TV input selection and Windows Project display mode
- Who:
- you, with the LG TV remote and the PC keyboard.
- How:
- confirm the LG TV is set to the correct input for the connected PC, and press the Windows and P keys simultaneously on the keyboard to open the Project panel and select the desired display mode.
- Result that matters:
- the PC sending video output to the active input selected on the LG TV.
- If the desktop becomes visible:
- proceed to Display settings in Windows to verify a supported resolution.
- If Unsupported Mode remains on screen:
- adjust the PC resolution in Windows or boot into Windows Safe Mode.
- Evidence to keep:
- the input selected on the LG TV and the projection mode chosen in the Windows + P panel.
Evidence: [Pantalla de TV LG] ¿Cómo puedo solucionar los errores de pantalla o sonido que se producen al conectar un PC? · How to fix the Unsupported Mode message on an LG TV when using a PC
Set Display resolution to the Recommended option in Windows
- Who:
- you, on the Windows 10, Windows 11, or Windows 7 desktop.
- How:
- right-click an empty area of the PC desktop, select Display settings (or Screen resolution in Windows 7), choose the Recommended option under Display resolution, and confirm or apply the change.
- Result that matters:
- the Unsupported Mode message clearing and the Windows desktop displaying normally on the LG TV.
- If the desktop displays properly:
- check your TV user manual if you need the specific supported resolutions for your TV model.
- If the PC screen is not visible on the TV so you cannot change settings:
- use the Windows Safe Mode check below.
- Evidence to keep:
- the previous unsupported resolution and refresh rate and the Recommended resolution applied.
Evidence: [Pantalla de TV LG] ¿Cómo puedo solucionar los errores de pantalla o sonido que se producen al conectar un PC? · How to fix the Unsupported Mode message on an LG TV when using a PC
Start Windows in Safe Mode if the PC screen is not visible
- Who:
- you, at the computer connected to the LG TV.
- How:
- hold the Shift key while selecting Restart in Windows, go to Troubleshoot > Advanced options > Startup Settings > Restart, select Safe Mode (confirmed by a black background with Safe Mode in the corners), and set Display resolution to Recommended in Display settings.
- Result that matters:
- loading a basic video driver in Safe Mode so you can restore a compatible resolution.
- If the screen is visible in Safe Mode and you set the Recommended resolution:
- restart normally and confirm the message is gone.
- If the message still appears after trying supported resolutions:
- update or reinstall the PC graphics driver.
- Evidence to keep:
- photo of the Unsupported Mode prompt and whether Safe Mode displayed properly on the TV.
Evidence: How to fix the Unsupported Mode message on an LG TV when using a PC
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- TVs
- Brand
- LG
- Product type
- Smart TV
Known code variants
- LG modo no compatible
- LG TV modo no compatible PC
- LG TV unsupported mode
- LG TV unsupported mode PC
- LG unsupported mode
- LG webOS modo no compatible
- LG webOS unsupported mode
- Modo no compatible
- Unsupported Mode
What it means
LG official support documentation for LG TVs connected to a PC explains that the on-screen Unsupported Mode message appears when the computer outputs a display resolution or refresh rate that the television does not support on that input, or when an outdated, corrupted, or misconfigured graphics driver sends an invalid signal. LG notes that this guide was created for a representative model and actual settings, menus, and supported resolutions vary by device model and country. Seeing this message alone never proves that a hardware component inside the TV is faulty.
Warnings and stop conditions
- Mediumeditorial warning
Do not repeatedly change random settings when the PC screen is not visible on the TV; use Windows Safe Mode to restore a compatible resolution, and save your work before forcing shutdowns to enter Windows Recovery so unsaved data is not lost.
Evidence: How to fix the Unsupported Mode message on an LG TV when using a PC
Symptoms and causes
Probable causes · in order
- PC output resolution or refresh rate not supported by the TVCommon
The connected computer is set to a display resolution or refresh rate that the LG TV cannot handle on the active input.
Evidence: [Pantalla de TV LG] ¿Cómo puedo solucionar los errores de pantalla o sonido que se producen al conectar un PC? · How to fix the Unsupported Mode message on an LG TV when using a PC
- Outdated, corrupted, or misconfigured PC graphics driverPossible
A graphics card driver issue on the computer prevents a compatible video signal and outputs an invalid mode even when the intended resolution is supported.
Evidence: How to fix the Unsupported Mode message on an LG TV when using a PC
- Video adapter compatibility limiting resolutions or refresh ratesLess common
Using an external display adapter, such as an HDMI to DisplayPort adapter, can alter compatibility and restrict supported resolutions and refresh rates.
Evidence: How to fix the Unsupported Mode message on an LG TV when using a PC
Virtual technician
Does Unsupported Mode still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 2
How to fix the Unsupported Mode message on an LG TV when using a PC
LG · 2026 · official_doc
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