You can always check if its not something as simple as a component having come loose...

Open the machine, check if all the cards are in propperly... (you should not be able to see the golden rows of "teeth" where the card clips into the slot... so press on all the cards with MODERATE force, (please dont go snap anything)...

Check if the memory is propperly in by using the same method... and while you at it, check that the ribbon cables are in firmly aswell...

even though it doesnt boot, leave the machine on for 3- 5 minutes, and feel if any part of the computer gets excesively hot, check if all the fans are spinning. The Heatsink on your CPU should NEVER be hotter than lukewarm. for that matter no component should be much hotter than lukewarm.

If all these things are fine...

try the following:
While the machine is off
unplug the power from the unnecesary devices like CD rom, stiffy drive, 2nd hard drive (if any).
See if it will boot now...
If this help, there may be a problem with one of those devices, OR your powersupply is faulty and is no longer supplying enough stable power (and this is where my gut tells me the problem may be, if its not a faulty motherboard and/or CPU as suggested earlier).


Your existence alone, is excuse enough for the creation of the entire universe… Il you my darling Jeanne-Dré 