During trying to reformat and reinstall XP professional the computer starts beeping (constantly) and the screen turns black. (I can restart holding the start knob for 5 sec.) H. Thorsteinsson

1. unplugg power cord 2. take out the ram and put it back 3. reset cmos battery 4. plug the power cord 5. reset cmos settings to default (using cmos settings utilty) Good luck

Also check (with no mains power connected to system at all) all power supply connections to the motherboard And to re-iterate as per "dark...." remove mains power into system completely (as in remove the mains-lead...) when going thru "his" check list...

have you fixed it?...

Absolutely helpful. Everything works just fine now. Thanks a lot. Haengur

glad you sorted it out...