Hello to you all, I have a problem with my computer. It doesn't show anything on my display.It shows only a black screen. I changed the PSU with another of 400W same problem. I also changed the memory ( I have 1x512 M), I checked the video adapter ( is a GeForce 6600 of 256M/128 bits). I try it on 2 other computers but I don't know what to think. On the first all was all right and on the other, same problem as mine. The spec of my computer: AMD BARTON 2600+ MB ASUS VT880 512 M RAM HDD-160 GB ATA 133 GeFORCE 6600 256M/128 bits on AGP slot OS WINDOWX XP SP2 Any suggestions, please? Help?