I have the same problem and I solved it. I have a sony bravia x90h TV. I went to setting > external inputs > external device setup > PC.
This is a tv settings not pc settings.
I hope it solve your problem.
Why is my second monitor turning off when I turn off my TV? (Also Windows forgetting audio settings)
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Anonymous
When I turn off my third monitor (TV,) my second monitor on my desk shuts off when the tv is turned off. When I go to display options, it shows that the monitor disabled itself. When I re-enable, suddenly the TV won't connect (because Windows disabled it for some unknown reason), making me have to force it to extend again.
Why does this happen? It didn't happen with my old TV. I am on the same graphics card, Windows Update, driver, and hardware except for the TV. I have tried matching all display refresh rates when looking through the forums, but it keeps doing the same thing. Sometimes if I'm lucky, the computer acts like the TV is on even when it's off and everything is fine.
Also, whenever I turn off the TV, Windows forgets my TV's surround sound settings, as if the operating system can't save those like it does with my headphones... It thinks the TV is a new device yet remembers the HDR calibration I did for it and the refresh rate and resolution I set. Updating display drivers didn't fix the problem so I rolled back to rule that possibility out.
The RTX 3080 definitely has enough horsepower to drive a 4K120 display, a 4K60 display, and a 1080p60 display simultaneously. If it didn't, then having all monitors on and doing things at the same time wouldn't work. It is not a bandwidth issue.
The second display itself is fine because when I unplug the TV rather than turning it off, it acts completely normal, which makes 0 sense.
Specs:
R5 3600
Corsair Vengeance DDR4 3600mHz
Samsung 970 Evo Plus 2TB NvME
WD Black 7200RPM 2TB
WD Blue 5600RPM 4TB
Geforce RTX 3080 10GB
Windows for home | Windows 11 | Display and graphics
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Anonymous
2024-02-07T18:42:57+00:00 -
Anonymous
2024-02-28T21:05:50+00:00 I found the solution,
Go to all setting on your TV (im using samsung), then click on “connection” then “external device manager” then “input signal plus” then disable the HDMI input that you connect it to your PC with. That should solve the issue.
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Anonymous
2023-12-05T09:01:47+00:00 - 1 to what you are saying
same setup (2 monitors on DP, one TV on HDMI)
When I turn the TV off (or if i boot with the TV off) only the main monitor remains active and both the TV and the second monitor become disabled.
The error is happening constantly, every single time the condition apply. The only "solution" so far has been keeping the tv on or go into display setting once this happens and manually reactivate the monitor.
Any chance we can have a fix for this?
s
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Anonymous
2023-09-29T17:20:28+00:00 The "solution" was to just always leave the TV on. I haven't found a way to fix it either. The answer from the rep telling us to replace the TV is pretty funny though, apparently Windows can't handle a brand new high end TV.
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Anonymous
2023-08-23T05:48:39+00:00 Adding these two images for context. Top image shows the setup when all displays are on, bottom image shows what happens when the tv (display 3) is turned off (both displays 2 and 3 get disabled).