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780G and Sony TV Display Issues

post #1 of 8
6/5/08 at 4:18pm
Thread Starter 
I know there is already a thread for the Gigabyte board (which I have) but it is so expansive I wanted to start a new post. Is there anyone out there that has been able to get any of these 780G boards to work with a KDS-A3000 model Sony RP LCD? I have tried everything, I think, and have had no luck getting anything on the digital side. VGA displays a picture albeit not filling the whole screen. I have not been able to get anything over HDMI or DVI-->HDMI, just a black screen. I am using the Catalyst 8.5 Drivers and have tried the 8.3 and 8.4 as well, with the same results. If anybody has been able to get these boards working please let me know, and include how you were able to accomplish this. Thank you.
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post #2 of 8
6/5/08 at 7:35pm
Have you tried turning off the computer completely, turning on the tv (and waiting for it fully come on) and then turning on the computer?

The computer would only try the HDMI handshake when the computer boots and if the TV was not on when the computer booted, the handshake would fail and the TV would never get a signal.
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post #3 of 8
6/6/08 at 5:16am
Thread Starter 
Quote:
Originally Posted by jje4th View Post

Have you tried turning off the computer completely, turning on the tv (and waiting for it fully come on) and then turning on the computer?

The computer would only try the HDMI handshake when the computer boots and if the TV was not on when the computer booted, the handshake would fail and the TV would never get a signal.

The TV was on the whole time I was trying all of these things and yes each time something would not work I would restart the system make any BIOS changes necessary then let it boot. Do you have a KDS-A3000 model? If so does this setup work for you? Thanks.
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post #4 of 8
6/6/08 at 9:46am
Make sure you've got your HDMI/DVI enabled in the BIOS. By default I believe HDMI is disabled.

Catalyst drivers by default apply underscan, assuming that your set has a bit of overscan by default. You can easily adjust this in the Catalyst Control Center.

I've got a KDFE50A10 Sony LCD RPTV connected with a DVI->HDMI converter cable and it works great (after the underscan adjustment). It occasionally loses sync, however, and I get a black screen. Putting the HTPC into S3 and back fixes this, though I'm hoping this is addressed in a new driver release. It happens rarely though.
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post #5 of 8
6/6/08 at 10:30am
Thread Starter 
I ensured I had the proper BIOS selection for everything I tried. Either DVI/Dsub or HDMI/Dsub. I am aware of the underscan and can handle that if I could get a digital display in the first place. BTW I had no problem with the DVI output to my 20" Samsung monitor at 1680x1050 resolution. The problem only shows up when I try to hook this to my Sony RP LCD. Also I am completely unable to make the secondary display the primary under CCC. As I said before my Nvidia 8600 works perfect with this board, of course with the on board graphics disabled, that is. So it seems to be a ATI/AMD issue. I can't help but feel I should have gone with a Nvidia 8200 GPU setup at this point.
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post #6 of 8
6/8/08 at 1:13pm
Thread Starter 
Anybody have any other ideas? I have had to revert back to my Nvidia 8600 again. I still can't get it working. Real disappointment from AMD/ATI. I think in the future I will stick with Nvidia.
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post #7 of 8
7/3/08 at 7:57am
I am having the same problem with my gigabyte 780 and my sony KDS50A3000... I'm getting no picture at all on the TV via HDMI ..
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post #8 of 8
7/3/08 at 5:52pm
Had similar problem recently using Gigabyte's 690G board and Sony 40" LCD. Worked fine on the VGA side but not HDMI/DVI. After hours of fiddling, it turned out to be a bad HDMI cable. (One of monoprice's cheap cables, so there is some truth to you get what you pay for. But generally I like monoprice.)

Other observations:
- Install the latest Catalyst drivers (8.5 is the latest so you should be good)
- Avoid dual monitor setup (don't hook TV up to both VGA and DVI/HDMI outputs). This avoids the CCC and software confusion over which "monitor" you are using. Or maybe it was just my confusion For instance, I discovered PowerDVD won't play when you have the desktop cloned. I prefer using DVI/HDMI only for HTPC needs.
- For testing take any AV receiver out of the loop. Plug directly into the TV.
- The 690G's don't have a BIOS selector for DVI/HDMI. Both VGA and DVI/HDMI outputs are always on to my knowledge. Can't help there.
- Using DVI/HDMI, do you get the normal boot screens (will be in 480p)? If so, the hardware output from the digital side is working. That points to drivers or OS.

Good luck and let us know the outcome.
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