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Last response: in Graphics & Displays
January 15, 2009 10:06:09 PM

I just installed my new ATI HD4870. Problem - The video shows up via DVI when the machine posts and starts to boot up to windows. Then it will stop sending a signal to DVI port. S-Video works fine. I am running Vista x64 will all the latest ATI drivers installed. Any ideas what is causing this? Thanks in advance!

More about : video ati hd4870

January 16, 2009 12:40:13 PM

Video works when using the generic windows video driver, but when I install the catalyst driver and reboot this issue comes back.
January 16, 2009 1:51:33 PM

What monitor do you have? Try the VGA cable instead of the DVI cable. Does the monitor support HDCP? My buddy has this problem, his 26" monitor does not support HDCP so he has to use a vga cable.
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January 16, 2009 1:52:58 PM

If i use the DVI-VGA adapter and a VGA cable I get the same problem.
January 16, 2009 2:09:25 PM

Interesting. Did you try both DVI ports on the card?
January 16, 2009 2:15:23 PM

January 16, 2009 2:30:19 PM

what monitor are you using? you seem to loose signal/picture when the drivers default settings kick in, maybe the rez or frequency is out of bounds for the screen to display.

try booting into safe mode, change the settings, and boot back to windows. the display settings should stick...
January 16, 2009 3:06:14 PM

I am using a Dell 2001FP monitor. I boot to safe mode and turn the resolution down to 1024x768 just to make sure, then boot back into windows and it goes out right have the green Vista bar runs across the screen. You can hear the audio so it is up and running, and I can RDP to it just fine.
January 16, 2009 5:00:38 PM

Refresh rate maybe? That is just odd.
January 17, 2009 5:14:47 AM

Had this problem on my computer. the solution is to go into CCC, go under digital panel attributes, and check/uncheck "reduce DVI frequency on high-resolution displays.
January 19, 2009 1:45:46 AM

Tried that, still no success.
January 20, 2009 2:28:40 PM

I'd try it in another PC and see if the issue follows it. Maybe it is a bad card.
January 20, 2009 2:37:04 PM

jay2tall said:
Refresh rate maybe? That is just odd.

January 20, 2009 2:38:29 PM

Nope....refresh rate is set to 60 like it is supposed to be.
January 20, 2009 2:39:09 PM

Can't try it in a different machine because I don't have another one with a PCI-E slot.
January 20, 2009 2:43:20 PM

You could always RMA it.
January 20, 2009 2:56:54 PM

Already in the works, but I know when I get the new one I will have the same result.
January 20, 2009 4:12:02 PM

How do you know?
January 20, 2009 4:57:59 PM

I can get it to work with the default Vista driver through DVI, but right after installing ATI drivers and rebooting I get this issue. I'm just saying I won't be surprised if it does the same thing. I sure hope I am wrong though.
January 20, 2009 5:40:41 PM

try installing just the driver itself without installing ccc.
January 20, 2009 8:33:28 PM

Did that as well.
January 21, 2009 12:50:31 PM

It could very well be the card. I mean the ATI drivers will use parts of the card that the default drivers probably do not.