The keyboard is not working, try another ps2 type. Win XP after a power cut should re-start without your intervention. If you ignore the start up error messages about F8 and such winXP should start up at least. Then a close and re-start normally sorts it out. Your faulty keyboard is causing your pc to hang. In the BIOS I bet it's set at stop on all errors or keyboard error. Try another ps2 keyboard.
Sigi
September 2009