Monitor will not find new motherboard

Dec 05, 2008

-   As my old computer died, I got new power supply and new motherboard (Asrock K8NF6G-VSTA), and had a friend combine it with older (2 years) AMD 3000+ processor, DVD drive, etc...When turned on, it all appears to be working, but we couldn't get a picture on either one of 3 monitors we've tried (we also tried a couple of cables, just in case). While we were trying to get a picture on screen, when turning the computer on it would just turn itself off after a second, and that would happen several times before it would finally turn on normally (again, no picture). Friend tried plugging in another graphic card, nothing changed. Everything appears to be fine (well, except the turn on/off thing), but we can't get picture, and so can't install drivers from CD, etc... Any ideas? -   mariana3