First the specifics of my nearly 4 year old machine: 300 MHz Celeron overclocked to 450 MHz, ABit BH6 Board, 384 MB RAM (3 128 MB SDRAM modules with 256MB installed within the last six months), Windows 98 Original Edition. Chip is cooled with 2 fans. Voltage to CPU was set at 2.05 volts for about 3 years then things started getting flaky with loads of page faults. Raised the voltage to 2.10 volts and things stabilized greatly. Now on to the problem... Powered up my computer and it went through the POST okay, did the RAM check fine. Immediately after the RAM check finished, the PC shut off on its own. The monitor briefly showed a graphic indicating was not receiving a signal from the PC, but then that went away. All other peripherals had power. Tried to re-start PC, but nothing at all happened as in I might as well have been pushing the power on switch to an unplugged PC. No LED lights, no HD spin-up, nothing. Have not checked the CMOS battery yet, but would be surprised if that was the problem with the PC just all of the sudden cutting out. Have another friend with an Abit BH6 MB with Intel 450 MHz CPU (not overclocked). Same thing happened to him about a month ago. He replaced his power supply and still no luck. Any ideas??

My guess is that your overclocked CPU has gone the Recycle Bin in the sky.

My conclusion as well. Am now looking to upgrade.

Unplug the PC, crack the case, take the battery off the motherboard, press the power button to clear the electricity in the powersupply, wait 10 seconds, put the batter back in, plug back in and hope for the best. It would sure beat buying a new CPU... right??

Possibly dead motherboard? There are some good motherboards in CompUSA for less than 150 bucks. Theres this Soyo Tec. One that supports Pentium 4 processors; that will look good on you.

sounds like youve cooked your motherboard. I have an abit kt7a and it powers up even without a cpu installed, but obviously no post on screen, just a powering up of components.If your motherboards anything like mine (well tis an abit)it should still power up with a dodgy cpu - just wont post.

Taking the battery out and pressing the terminals on the mobo brought mine back to life.