Question about HP Pavilion a1140n (PX774AA) PC Desktop
If you replaced the power supply and its still not working you most likely have a dead motherboard.
Posted on Mar 23, 2011
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Posted on Jan 02, 2017
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The mother Board is a possibility, but I think that first I would check the main power supply. It is best to substitute in a known good PS to verify. If a good power supply fails to correct. I would look on the mother board for obvious hot spots or electrolytic capacitors with bulging tops or shrunken PVC outer coverings. Manufacturers have built with defective or incorrectly marked capacitors before. I have repaired several by just replacing the caps that had overheated and started to vent pressure after doming their tops.
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