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  Tom's Hardware Forums » Graphic & Displays » Graphics Cards » Can't get signal from DVI to LCD TV! TRIED FOR 2 MONTHS!
 

Can't get signal from DVI to LCD TV! TRIED FOR 2 MONTHS!




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 Thread : Can't get signal from DVI to LCD TV! TRIED FOR 2 MONTHS!
 
Profile: stranger
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I have a 32 in LCD TV (that is my primary monitor)

No matter what I've tried...I cant get it to accept a signal from ANYTHING other than a VGA out. Can't use a DVI adapter. Guys...trust me...I've tried everything...dvi/vga adapters, different cards...different drivers...nothing. Low resolutions.. I see boot up and windows logo...then "No input" from screen as soon as windows kicks in. It works before I install drivers...once geforce drivers (Latest ones)are installed..."No input" I've tried two older drivers...same problem
I'm currently running 1366x768 custom using the VGA out from card. Works fine, but I'd love to fix this so I can move to a better card (8800 gt?). If I plug it into DVI out, screen goes black at windows start. I can see boot process fine. Once again, It works before I install drivers ...boots into windows at 1024x768
I install drivers...blam...same problem. I even purchased an ATI card...wiped NVIDIA Drivers off system, install latest ATI drivers......Boot up, and...and...NO SIGNAL. Same thing.

If you want to see everything I've tried, check this thread: http://forums.guru3d.com/showthread.php?p=2602304#post2602304

I'm currently using a evga 7600 GT. TV is a Scott (Akai) LCT32SHA
(Windows sees it as "Plug N Play" Monitor)
NVIDIA control panel recognizes it as LCT32SHA correctly. Can anyone tell me what the deal is?
I've been trying to get this working for three weeks.
I really apreciate ANY help to get a DVI to work with this TV/ Monitor. THANKS!


Message edited by BoogeyMan1 on 02-15-2008 at 05:06:04 AM
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Profile: stranger
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So...no one can figure this out?


Sigh.

Profile: enthusiast
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There are one or two "implied" resolutions for DVI. In other words, the DVI spec stipulates that if you are connected via DVI, then the display device must support the implied resolutions. Check wikipedia, and then the official DVI spec site for details.

If your LCD doesn't support one of those, and it happens to be what the drivers default to when they start up in windows for the first time, then that could be the problem.

If you have another display device to connect to, I'd recommend connecting to that, setting a resolution you know your LCD will accept, and then switching over. Or, you could boot up in VGA mode and force 640 x 480 display if your LCD can display that (which it might, since it shows the boot sequence). Once in, you could use regedit to set / modify the default screen res in the registry (no, I don't know where it is... but I have a hunch it's in there somewhere), and then try doing a normal boot.

Best of luck.


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Profile: enthusiast
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Just some clarifications:

Post your system specs (motherboard, ram, OS, etc).

It works fine VGA-VGA, but not VGA-DVI or DVI-DVI?

Does every combination of output-input work in safe mode?

How did you do your driver removal? Hopefully you used a good driver removal tool.

Have you done an OS reinstall (XP 32 bit?), it may be easier just to start from scratch again and work up from there. Also make sure your chipset drivers are up to date and the MOBO BIOS is correctly configured.


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Profile: Faithful Poster
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And what resolutions and refresh rates have you tried?


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Profile: enthusiast
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TeraMedia wrote :

There are one or two "implied" resolutions for DVI. In other words, the DVI spec stipulates that if you are connected via DVI, then the display device must support the implied resolutions. Check wikipedia, and then the official DVI spec site for details.

If your LCD doesn't support one of those, and it happens to be what the drivers default to when they start up in windows for the first time, then that could be the problem.

If you have another display device to connect to, I'd recommend connecting to that, setting a resolution you know your LCD will accept, and then switching over. Or, you could boot up in VGA mode and force 640 x 480 display if your LCD can display that (which it might, since it shows the boot sequence). Once in, you could use regedit to set / modify the default screen res in the registry (no, I don't know where it is... but I have a hunch it's in there somewhere), and then try doing a normal boot.

Best of luck.



Very true, this is why an LCD TV is not technically a monitor. Have you tried a LCD monitor that supports the native DVI resolutions?


---------------
Take what man makes and use it,
But do not worship it,
For it shall pass.
Profile: enthusiast
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From a quick search, that tv has a hdmi input on it. Have you tried dvi out from gfx card to hdmi (using adapter) on the tv? Seem to be easy to find. e.g.
http://www.mycablemart.com/store/c [...] Egod2TuY3A

Profile: stranger
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This maybe the tell, Bad GTX...
...if I boot to a standard CRT monitor from DVI out, boots fine...looks great. I then swap cable to my 32 LCD...it works fine at any resolution.

That tell you guys how I might fix this without cable swapping every time I boot up?


Message edited by BoogeyMan1 on 02-15-2008 at 08:03:09 PM
How cool is that!
Profile: enthusiast
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I'm not 100% sure on this but my 7950GT/OC only came with DVI-Component adapter. As far as I know these cards did not have the HDMI capability.
If your tv has component you can run that way and still get the 720p that the tv is capable of.
Hope this helps.


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Profile: enthusiast
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So how about booting with the monitor off and just turn it on when windows loads?

Profile: stranger
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Nope...wont work.

Profile: enthusiast
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On the nvidia control panel on display -> set up multiple displays there is a question mark with "my display is not shown in the list" clicking on that brings up a window with "force television detection at startup" tick box. Have you tried that?

Profile: stranger
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OOOhh No Haven't see n that oh BOY!
Wish me luck...here goes....


...nope....didn't work. Had to even boot into safe and remove drivers to boot up again. :)


Message edited by BoogeyMan1 on 02-15-2008 at 08:51:29 PM
Profile: Eternal Poster
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You can go DVI to HDMI if your HDMI is video only. Most HDMI is set for video and audio, if this is the case your speakers will squeel because there wont be sound.

DVI is a digital signal and your VGA is analog so it wont work.

2 options for you.
1. Use DVI to HDMI if your HDMI in is Video only.
2. Get a card that has built in s/pdif so you can do DVI to HDMI with sound. This card or one like it would work. http://www.newegg.com/Product/Prod [...] 6814500006


Message edited by roadrunner197069 on 02-15-2008 at 08:34:41 PM
Na Zdravie!
Profile: member
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From my experience...If you have an HDMI on that TV, you wanna use it...

get a simple DVI to HDMI adapter and you'll be golden.