Hi I have a problem. At first my computer didn't went on so I changed the power supply. It still wasn't working so i changed the motherboard. When I got everything into place (all connections and other stuff) i tried to turn it on. It worked! So i connnected mouse, keybord and monitor to futher installation and the words "No signal, check video cable" have appeared on the screen. CD, DVD and floppy doesnt work too ( cd and dvd won't open) and none of the light is working just power supply fan and processor fan works. No lights and no signal form the computer. If not fans, I would say that computer is dead :) if you know anything or have some advises, write a comment. Thank you! P.S. My OS is Windows XP not Vista

February, when you replaced the MB, did you reinstall Windows? Suspect the newbie doesn't know where to look for things like OS, drivers, etc. HTH. Ed in Texas.