Hi, The PC will post if it has been powered on for a time by pressing the reset button. What is the fault when a PC POST from cold? I have test swapped the power supply. Removed and replaced the 2 ram chips individually in different order an just as single units. CMOS voltage is within tolerance at 2.75 volts and has been swapped out for another with a similar voltage 2.8v. No post beeps are heard when PC refuses to boot. Any ideas people? Thanks. Motherboard ASRock K7VM2 2*DDR Dimm Athlon Duron 2400+ Socket A(462) OS XP SP3 (but not really relevant to this problem)
Any capacitors on the motherboard swelled or leaking ? The top or bottom bulges out an stuff runs out. If so it's new motherboard time... rrrh1 (arch1)
I used to occasionally have that problem with an old socket A machine a few years ago. Worked fine with a 2600+. Upgraded to a 3000+ and it started doing that. Was able to mostly eliminate it by overvolting the CPU. If you do, do so at your own risk. Though it was a very small about that I used, something like .025 extra volts. No overclock.
There's good video and graphics reference material showing examples of, and how to detect, bad caps on the badcaps.net website. About 4 years years ago I had an Asus board that went kaput from a bad cap; same symptom, it just suddenly wouldn't boot. It took careful examination with a magnifying glass to find the problem cap, which was just slightly bulging and slightly tilted. Without the badcaps website I almost certainly would not have identified the problem as quickly.
Thanks all. Cannot see any bad caps; I have repaired a monitor that had bad caps so I understand what you people are saying. Time to dump this PC I think.
