Hi to you all, I have an XP pc that will not boot, When I switch on the monitor wakes up then swithces itself off,the pc beeps once and swithes off though some times only the power LED goes off and the HDD led glows slightly. The PC tries to shut down but sometimes the PSU fan stays on even when the power LED is off. I have tried changing the PSU for a new one but can getb the PC to boot up. I swapped a W98 tower unit in its place ie connecting to the XP's keyboard/mouse and other periferals. that PC then developed the same symptomd 2 days later. Any one out there with a solution or similar problem?