repairs on motherboards

Jan 23, 2019
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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

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May 27, 2010
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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

 

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