I'm running a system that was built for me but I am not completely familiar with the specs. Its about 2 and half years old. Its a WinXP, 200gb, Asus Mobo, AMD Athlon, 2gbRAM, 400W PSU system as far as I know.
Maybe a month ago, the computer started to just switch off on me for no apparent reason. At first I ignored this thinking it was because I was overworking it. Of course, as this happened I did all the usual virus checks but came back clear. (I have witnessed the BlueScreenOfDeath three times throughout this process but it has run again perfectly after appearing.) Also before it went completely kaput this evening, it restarted twice on its own.
Then it started to not boot up correctly...
When I press the power switch, both the PSU and the processor fans initiate and run fine. The hard drive sounds as if its spinning and the CD-Rom drive is useable however nothing appears on the screen. After a couple of times of pressing the on switch on and off, it does the single beep as it did when it worked normally and continues to boot as normal and works fine. Until today, where it has not progressed after switching on and off. The light on the front comes on and the fans are running but nothing is sent to the monitor and the beep is not present. (Twice to start with it loaded to the POST screen but froze at AMD Athlon) but since has not got to even switching the monitor on.
So far I have tried removing all USBs and peripherals from the back of the unit. I have also tried removing the hard drive and the cd-rom to see if I could isolate a problem. Remember that it was running fine for at least 6hrs today doing the usual tasks. I have not made any hardware upgrades since the PSU upgrade about a year ago.
Any help would be much appreciated. I was thinking maybe that it could be the power supply failing to get enough power to the HDD or something, but I don't know enough about this.