Unfortunately I have encountered the same problems as listed in this (and many) forum(s). That is I have a ViewSonic VX2025wm and when I boot via the DVI cable I get the ‘no signal’ message displayed on the screen and nothing else. I thought I would share my experiences as I was never able to get mine to work (spent about 8 hours trying) and in the end I had to return mine for replacement. It should be noted that I was always able to get the LCD to display via the d-sub connection. I was also able to get the LCD to display via the DVI cable if I booted into Windows with another LCD via the DVI cable, then swapped to the VX2025wm. However I was not able to get it to boot via the DVI cable when the VX2025wm was connected.
Just for the record I have a XFX 7800GTX OC 256MB 450Mhz / 1.25Ghz. What I thought I would do is list out all the possible fixes I was able to find for this problem in the one place for your easy reference. As I said I was not able to get any of these to work and had to return my LCD for replacement. However I have seen on various forums that people have had differing levels of success with these fixes. I wish you all the best, however if like me you get to the end of this list and still no luck, I strongly recommend returning your LCD as it’s probably faulty (mine was). The replacement I received is now working fine from the DVI port.
One last thing I should also point out is that I have seen many people asking whether or not it makes any difference if you connect via d-sub or DVI. Although I can’t say from a technical point of view I can say that from my point of view the LCD preforms better via DVI. I noticed a clearer picture and faster fps via the DVI (this could just be my imagination but I thought I’d share anyway). So I recommend going to the effort of getting your LCD to display via the DVI, don’t just settle for the d-sub.
Possible fixes for the ‘no signal’ problem encountered when booting via the DVI cable on the VX2025wm:
• Try the LCD of a different system just to ensure it’s not your system (very unlikely but best to check).
• Try a different DVI cable.
• Check that you have no bent pins in either end of your DVI cable.
• Ensure your DVI cable is secured tightly via the screws. At both the video card and LCD ends.
• Plug in both the DVI cable and d-sub cable, boot up into Windows completely, then use the OSD from the LCD to change the input from Analogue to Digital. Shutdown (do not touch the DVI cable), once shutdown completely, turn off the LCD, remove the d-sub cable and start up your system. This fix has worked for most people.
• Try turning off the LCD and your system unit at the wall (obviously make sure your system is shutdown first). Then turn on the LCD and system to drain all the power from both units. Leave it for a few seconds (also try a few minutes if it doesn’t work the first time), then turn them back on at the wall and power them both up. This fix seams to have worked for most.
• Reseat your video card.
• Reset you CMOS.
• Try factory resetting your screen by holding down the 2 button when you push the power button. Once the screen comes on bring up the OSD (press 1). You will now see an extra option in the menu, this will allow you to go to the service menu, it will be an ‘F’. Select the ‘F’ from the OSD, you are now in the service menu, select factory reset. This will take a few seconds and then your screen will turn off. Shutdown your system, then turn the LCD back on and start your system.
• You can also try the DVI_Recover tool (google search for it) which seams to have worked for some. I wouldn’t recommend this as it’s made for Del LCDs. It also wipes your serial number out of your screens internal memory (It won’t show up in the OSD menu anymore which may affect warranty). However some people have had results with this tool so give it a go if you’re desperate (I recommend sending your unit back rather than using this tool).
One last note, if you do end up getting it working, or you get a replacement and it works via DVI, one other problem you may encounter which I did was the following.
When I turned my system on it displays via the DVI however when it starts to load Windows the screen goes blank and a message is displayed saying ‘out of range’. This is easily fixed I found by booting into Windows in VGA mode (Press F8 after POST and before Windows loads, from the menu select VGA mode). Once you are booted into Windows in VGA mode, simply go to ‘add remove programs’, select your Nvidia drivers (I guess this would be the same for ATI cards but I’m not sure) and uninstall the display driver. Reboot and Windows should display fine now. Once Windows has finished loading, reload the latest Nvida drivers for your video card, then load the drivers for your LCD. Select the resolution and refresh rate you want, etc and then reboot. Your screen should now be working correctly, my certainly is.
I hope this has helped and if like me you’re unlucky enough to have one of the screens with the DVI problem, rest assured there is a light at the end of the tunnel. One way or another (either via the suggested fixes or replacement) you should be able to get this screen to work for you.
Thanks
keo