[SOLVED] repairs on motherboards

[wamslbl]

i have an hp500mt desktop when i turn it on, the power, hdd leds dost not lit but the fans run. the processor does not heat up correctly, no display...what could be the problem?

 

[Eximo]

Likely power supply failure. If the fans run and the system doesn't boot, usually means that 5V+ is not working.

Only real way to verify that is with a volt-meter / multi-meter.

Then you would start looking at motherboard problems. Though typical response to non-boot is to remove everything that isn't necessary. So no drives, single stick of memory, remove any potential GPU (probably not in this situation) This will rule out a faulty component that is shorting out 5V.

Without known working hardware to test with you can't really check CPUs or Motherboards though.

Here is a more thorough guide: http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems