I'm currently having major problems with DVI-out.
A couple of months back I ordered a TFT monitor (Iiyama Prolite C480T), and after using it with DVI-out for about half an hour, the colours went haywire: essentially, the R part of the RGB signal disappeared, leaving me with just G and B. I initially thought there was a problem with the monitor, but plugging the monitor into my brother's computer revealed that it was working fine. I therefore assumed that the DVI-out on my video card (ATI Radeon 9700 Pro) had died, since I was able to use analog VGA-out with no colour problems.
Flash forward two months. The Iiyama monitor has been returned to the store for reasons I'm not going to bother going into here, and has been replaced by a Sony SDM-X73B. For the past 3 weeks I have been using it through VGA. This morning, however, my new graphics card arrived (ASUS Radeon X800 Pro), but the colour problem through DVI remains present... on my brother's monitor, that is (Philips 170B4BS). On my Sony monitor, I get no output at all via DVI: just a blank screen and the message that the cable is not connected. Once again, VGA is working fine.
So there you have it. Different monitors, different video cards, different DVI cable, but the same problem is there. This surely means that, barring the highly unlikely coincidence of buying another video card with exactly the same problem as the previous one, the problem must lie elsewhere in the system. Motherboard? CPU? It seems unlikely to me, but I'm completely at my wits' end with this. Any ideas?
A couple of months back I ordered a TFT monitor (Iiyama Prolite C480T), and after using it with DVI-out for about half an hour, the colours went haywire: essentially, the R part of the RGB signal disappeared, leaving me with just G and B. I initially thought there was a problem with the monitor, but plugging the monitor into my brother's computer revealed that it was working fine. I therefore assumed that the DVI-out on my video card (ATI Radeon 9700 Pro) had died, since I was able to use analog VGA-out with no colour problems.
Flash forward two months. The Iiyama monitor has been returned to the store for reasons I'm not going to bother going into here, and has been replaced by a Sony SDM-X73B. For the past 3 weeks I have been using it through VGA. This morning, however, my new graphics card arrived (ASUS Radeon X800 Pro), but the colour problem through DVI remains present... on my brother's monitor, that is (Philips 170B4BS). On my Sony monitor, I get no output at all via DVI: just a blank screen and the message that the cable is not connected. Once again, VGA is working fine.
So there you have it. Different monitors, different video cards, different DVI cable, but the same problem is there. This surely means that, barring the highly unlikely coincidence of buying another video card with exactly the same problem as the previous one, the problem must lie elsewhere in the system. Motherboard? CPU? It seems unlikely to me, but I'm completely at my wits' end with this. Any ideas?
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