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Windows 7: How to force output on ATI HD 4770

02 Oct 2012   #1

Windows 7 Pro x64
 
 
How to force output on ATI HD 4770

Hi everyone, I posted this on another forum but got no replies so I figure I'd try here...

I have an odd problem. I have a pc running windows 7 with an ati hd4770. I have it outputting to two displays: a 1080p monitor near the computer (in the home office) and to a 1080p lcd tv ~60 feet away in the living room. Both are being driven by the dual DVI outputs on the card.

This has worked well for about a year now (I'm mirroring the displays), but lately something strange has begun to happen: I'll turn on the tv and the pc will not recognize the TV as being connected and will not output a signal. This usually happens overnight (so it won't work the next morning). There is no power saving set up on the pc except for shutting off the displays after 20 minutes. This does not happen every night, but maybe a couple times a week. Sometimes a reeboot works, sometimes just plugging/ unplugging the HDMI cable int he back of the TV. When the reboot does NOT work, I always get the BIOS screen at least on the TV, and usually (but not always) the windows start (with the little coloured balls doing their dance) and then I loose it again.

When it is up and we're using it I never loose it, even for high throughput stuff like blu-ray.

So I figure it is a connection problem. I was an idiot and didn't get a DVI-HDMI cable quite long enough so I used two. They're in an electrical conduit outside the house so maybe something is wet, but it will be a REAL pain to cut them open and replace the cables. And if it IS a connection problem, why doesn't it fail during normal use?

Anyway, I want to know if there is a way to force 1080p 60 hz output on both of the graphics card outputs regardless of what is detected. Should be a way....


Forgot to add that I did try to switch the outputs on the card. Didn't seem to make a difference. I guess what it could be is that the card is outputting a stronger signal that the TV, so sometimes the TV signal gets lost and the card thinks there is no TV, but the TV will always see the cards output (assuming it is outputting). So I still need to force.

Thanks,

Cisco


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 How to force output on ATI HD 4770




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