Windows 10 supported my Sony Bravia screen, but Windows 11 does not..why not?

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Windows 10 supported my Sony Bravia screen, but Windows 11 does not..why not?

Fran and Barry Jones 20

Windows 10 supported my Sony Bravia KLV-46V300A TV screen on my desktop, but Windows 11 does not...with a message "unsupported Signal. Adjust your PC output". Is there a driver in Windows 10 that is not in Windows 11 that I can download into Windows 11 ?

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Answer 1

Henry Mai 1,970 Independent Advisor

Hi, I am Henry and I want to share my insight about this issue.

The problem is not a missing TV driver that you can download. Instead, the issue is that Windows 11 and its newer graphics drivers are stricter and often fail to correctly read the capabilities of older devices like your Sony Bravia KLV-46V300A. They attempt to send a modern signal (resolution or refresh rate) that your TV can't understand, resulting in the "Unsupported Signal" message.

The fix is to manually force your PC to output a signal that your TV supports.

Right-click desktop > Display settings > Advanced display.
Under "Display information," find the dropdown for Choose a refresh rate and select 60 Hz or 59.94 Hz.
If that doesn't work, click on Display adapter properties for Display [X].
In the new window, click the "List All Modes" button.
Select a standard, safe resolution from the list. Start with 1920 by 1080, True Color (32-bit), 60 Hertz. Click OK.
If that fails, repeat the process and try 1280 by 720, True Color (32-bit), 60 Hertz.

One of these standard HD modes should be compatible with your TV and resolve the issue.

I hope this helps point you in the right direction for your troubleshooting.

Barry Jones 0 Reputation points

2025-06-24T21:35:49.33+00:00

Hi Henry,

Thank you for your excellent info, I am learning a lot. I have followed the instructions as best I can but have not yet succeeded in getting my Sony Bravia KLV-46V300A to duplicate what is on my HP monitor. I have gone into Settings >Display>advanced settings>list all modes for Display 2: Wired Display and set the resolution rate to 1366x768 which is the resolution rate in the Sony Website for this TV monitor. This has not worked. (I have changed the resolution rate for the HP LA2206 Monitor to 1280x720 which has made the display letters and numbers bigger, which us good for us oldies! But does not solve the Sony Bravia problem.) One thing I note is that in System> Display >Multiple displays I see in Detect Other displays "we didnt find another display" so I wonder if the Display 2 Wired Display is actually the Sony Bravia , or something else ? Although in Display settings there are 2 squares with figures 1 and 2 in them. I have tried "duplicate these displays" which does not do anything. Your answer has been marvellous in stopping me going down driver blind alleys, but has not quite solved the problem yet. I am pondering on buying another, more up to date, monitor for the 2nd display. but will wait until you may respond to this.. Thanks again for your help so far.... Barry Jones, Auckland, New Zealand
Henry Mai 1,970 Reputation points Independent Advisor

2025-06-25T08:20:24.3366667+00:00
I see that this changes the diagnosis. The issue is no longer that Windows is sending a wrong signal; it's that Windows isn't making a successful connection with the Sony TV at all. The "Display 2" you see in the settings is likely a "ghost" or phantom display—a memory of a previously connected monitor. That's why changing its settings has no effect on the physical TV. So we will try to reset the connection between your PC and the TV.

Shut down your PC completely (Start > Power > Shut Down).

Turn off your Sony Bravia TV.

Unplug the video cable (HDMI or otherwise) from the back of your PC.

Turn on the Sony Bravia TV first and make sure it's on the correct input (e.g., HDMI 1).

Plug the video cable firmly back into your PC.

Now, turn on your PC.

Windows will be forced to re-scan for connected displays during its boot sequence.

Since this is a connection issue, we must consider the hardware itself.

Try a Different Cable: If you have another HDMI cable, please try swapping it. A cable can sometimes fail or be incompatible with a newer graphics card's signal strength.

Try a Different Port: If your PC has more than one video output port (e.g., another HDMI or a DisplayPort), try connecting the TV to a different port to rule out a faulty one.

Regarding your thought about buying a new monitor: that is certainly a guaranteed solution, but I am hopeful that one of these connection-focused steps might solve the problem with your existing TV and save you the expense.

Answer 2

Fran and Barry Jones 20

Hello Henry, thanks again for your input, which I have now used to solve the problem. The problem seems to have been that the Sony Bravia TV which I was using as a 2nd monitor has a VGA output port (vintage!) which I was, prior to today, linking to my new Windows 11 desktop via a VGA>HDMI adaptor . But now I have swapped the VGA>HDMI adaptor for a VGA>DISPLAY PORT adaptor and then, using the display settings, duplicated HP monitor to the Sony Bravia (well actually it started with the mouse cursor being on the Sony but when I duplicated to the HP the mouse moved back to where it should be)...and all is well ! Problem solved..so I will attempt to close this request, again with my thanks. Barry Jones, Auckland New Zealand.. (If I cannot close the request please feel free to do that)

Henry Mai 1,970 Reputation points Independent Advisor

2025-06-26T01:15:25.8766667+00:00

Hi Barry, great to hear you got it all sorted! Feel free to leave the thread open, others might find it helpful if they run into a similar issue. Wishing you all the best!

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Windows 10 supported my Sony Bravia screen, but Windows 11 does not..why not?

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