After numerous different kind of errors over a long period of time everything culminated today as my system crashed into a black screen just after BIOS loaded and numlock booted up but before XP started loading. Since then my system crash with black screen at every start up attempt. BIOS menu is available but it's not possible to boot up safe-mode. I suspect some kind of overheating issue as I don't have an extra chassi fan. Besides, I guess it could be some motherboard error if it wasn't for the fact that I replaced it less than a year ago. Any help would be greatly appreciated.