Problem with DVI

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Coldone2

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Joined
Jun 25, 2007
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45
Hi there

I recently put together a new PC, hooked it up to my LG 20.1 LCD L204WT through DVI and all I get is a black screen saing "Digital Power Saving Mode". I hear the PC runing and going into Windows but I get no display just a black screen. My graphic card is a Asus Geforce 8800Ultra and has two DVI outputs, ive tried using both but without any luck. When I use the DVI to VGA adapter everything works fine.

Ive used the DVI on this monitor for over a year with my old PC and I also tried hooking up my old PC again with DVI to see if it would work and it did without any problems so I guess that means the DVI on the monitor is working fine. Ive tried a lot of tricks and methods to try and get the DVI working with the new PC but it still isn't. If anyone might have any clue to what is going on or how I may be able to fix this, please post and thanks in advance.

My Specs are:
LG 20.1 LCD Wide L204WT-BF
Asus Geforce 8800Ultra
250Gb Sata HD
2gb ram
Msi Mainboard S-AM2 nForce 570 SLI ATX 2xPCI-E
530W Hiper PSU

If anyone needs more details on the spec ill post it.
 
did you make sure to plug in the power on the graphics card? I believe with the 8800 Ultra you need to have both 6 pin plugs plugged int or it won't work.
 
Both are in and its working without problems when using the DVI > VGA Adapter (analog) watching movies and playing games without probs on max settings etc etc.
 
Try pulling and reseating the video card. Even when they seem fully seated sometimes they really arent.
 
The video card is not giving the DVI out signal to the monitor.... time to replace the video card.

I had that same thing happen on an ATI 9600XT. analog would work.. but not DVI.
 
When you first start your computer push the Delete key on your keyboard 101 times to get into the bios without booting up into Windows. If you can't see a bios screen when your monitor is connected to the DVI port on your graphics card then the problem is with the video card / DVI port.

Do the same test with your VGA adapter.

This test will prove that your problems are not Windows or driver related. From what you've said, it seems to me to be a hardware issue with your graphics card and it will need to be exchanged. If you have another computer with a PCI-E slot you could try the same test above and then shut down without booting into Windows so you don't have to install any drivers.
 
no, but I dont think its the Monitor since it works with my other PC when I use DVI but not with this new PC.
 
I would be willing to bet about tree-fitty that this is being caused by the DVI issue present in a lot of 20" widescreen LCDs that use this particular screen - unfortunately I don't know what kind of screen it is, because if I did, I would never buy any monitor using that screen ever again. Basically what happens is, if you ever unplug your DVI cable, for any reason whatsoever, there's about a 25% chance that the DVI will then never work again until you reset the EDID for the monitor. I have no idea what that means, and if I had to figure out how to do it myself, I would have just beat my monitor (a Viewsonic VX2025WM, which I would wager uses the same panel as yours) with a sledgehammer. Luckily, there are smarter people on the internet than me, and somebody created a utility (or rather, Dell created a utility, because their monitors are affected by the issue as well, but then took it off their website) to burn to a CD and boot off of, which should automatically recover the EDID data. Unfortunately, I don't remember exactly what I had to do - I'm pretty sure it involved hooking both VGA and DVI at the same time, then booting off of the CD, at which point you will be able to switch back to DVI, but I'm sure you'll be able to figure it out. Here's the ISO:

http://www.jeffgeiger.com/Stuff/DVI_Recover.htm
 
I have a Viewsonic monitor, and I couldn't get it to work with the DVI, only the analog, it had an input select and stuff but it wouldn't switch over. I read somewhere (can't remeber) from someone that what they did was, power down the computer and monitor, unplug the DVI cable from the monitor, and then unplug the power to the monitor, click the power button for the monitor till the light goes out so you know its completly powered down, then plug in the DVI cable and then the power cable, then power up the computer, then it should work no problem, don't know if this will help, just thought I'd let you know what helped me. Good luck.
 
finalgt said:
I would be willing to bet about tree-fitty that this is being caused by the DVI issue present in a lot of 20" widescreen LCDs that use this particular screen - unfortunately I don't know what kind of screen it is, because if I did, I would never buy any monitor using that screen ever again. Basically what happens is, if you ever unplug your DVI cable, for any reason whatsoever, there's about a 25% chance that the DVI will then never work again until you reset the EDID for the monitor. I have no idea what that means, and if I had to figure out how to do it myself, I would have just beat my monitor (a Viewsonic VX2025WM, which I would wager uses the same panel as yours) with a sledgehammer. Luckily, there are smarter people on the internet than me, and somebody created a utility (or rather, Dell created a utility, because their monitors are affected by the issue as well, but then took it off their website) to burn to a CD and boot off of, which should automatically recover the EDID data. Unfortunately, I don't remember exactly what I had to do - I'm pretty sure it involved hooking both VGA and DVI at the same time, then booting off of the CD, at which point you will be able to switch back to DVI, but I'm sure you'll be able to figure it out. Here's the ISO:

http://www.jeffgeiger.com/Stuff/DVI_Recover.htm
Click to expand...

I have that ISO but I didnt use it as I was afraid it would mess up my LCD since its not a Dell or Viewsonic but I dont know, maybe I should try? The name of the screen on this LCD is Flatron if that means anything. But will there be any risk in using this DVI recovery tool on my current LCD?

Also what Ragenrok said ive already tried doing once without any help.
 
It can't hurt - it doesn't matter what the manufacturer is, if it's the same panel, it's the same EDID. It works on Dells and Viewsonics across a range of 19-21 inches, and I've seen reports via Google of it working on LGs. I'd say you have nothing to lose really, because the worst that could possibly happen is your DVI will continue to not work.
 
will try now then, does it matter which of the two DVI outputs on the G-card I connect the DVI and DVI -> VGA adapter ?
 
Just tried and it didnt help, got some error on the DVI recovery tool as well so I guess it does not support my screen.
 
I have a similar issue, using an old Athlon XP 1800+ and a Geforce 4 Ti4400, along with my "monitor" a Westinghouse LVM-42w2...

I get no image at all during boot/post, and it isn't until I get into Windows that an image appears on my screen. This is connected via DVI. My monitor has 2x DVI ports, and I have the same issue on both ports. My GF4 only has one DVI out, and is my only video cad with a DVI connection. I was always pretty sure it was an issue with my video card, but part of me dreaded that it may be an issue with my monitor.

I also use this monitor for my xbox360, with no issues there.
 
Well I just got a brand new Video Card and tried again with DVI, but its still the same. Wont work :mad:

So to sum up. The Monitors DVI works as I can get DVI to work with my old PC, the Video Card is not to blame as this is a brand new one. So what then could it be?
 
I would head over to the displays forum, a buddy of mine had the same issue with his Viewsonic (the same one i have) and the fix involved some bizzare ritual involving powering down this while unpluging that but dont re connect that till this is on kinda thing. It did work though. I'm at work but i'll dig a bit for ya.

edit:
1. With the computer on, plug in both DVI and VGA to the video card and the VX2025 monitor.
2. turn off computer
3. remove VGA connector
4. disconnect power to the monitor. Wait 5 seconds and then plug it back in.
5. restart PC.

give that a go
 
tried that with no luck.

Got this answer from a guy on another forum:

"its an incompatibility between the board and the display.

probably fixable via a firmware update."

Thoughts?
 
Coldone2 said:
"its an incompatibility between the board and the display.

probably fixable via a firmware update."
Thoughts?
Click to expand...
Very possible
Look at the PS3 & Westy 37" fiasco, the HDMIs are always outta sync cause of hardware/firmware.

I would also try changing video cables, if detachable!!! It's possible the GF8 needs all the cabling to be there to determine what monitor is attached (DVI-I) It also may be the other way around (DVI-D with no analog wires), maybe if it detects anything on the analog pins (actual cable) it chooses analog as a fallback from DVI?

I think it's worth a try, weird things have happened on simpler devices with wrong/generic wiring
 
MrkXCeL said:
Very possible
Look at the PS3 & Westy 37" fiasco, the HDMIs are always outta sync cause of hardware/firmware.

I would also try changing video cables, if detachable!!! It's possible the GF8 needs all the cabling to be there to determine what monitor is attached (DVI-I) It also may be the other way around (DVI-D with no analog wires), maybe if it detects anything on the analog pins (actual cable) it chooses analog as a fallback from DVI?

I think it's worth a try, weird things have happened on simpler devices with wrong/generic wiring
Click to expand...

Im using a DVI-D cable, tried using a DVI-D dual link cable with no luck
 
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