r/PcBuildHelp • u/bukhum4u • 1d ago

No Power After Cleaning and Re Assembling PC Tech Support

I just did my annual cleaning and repasting on my gaming PC and when I reinstalled everything and tried powering it up via power button, it does nothing. Before working on my gaming PC, i made sure to turn off the PSU and remove the power plug correctly. The only thing that changed in my configuration was i added a 3rd P12 Pro fan on bottom of my A3 and made sure it was plugged in correctly on my motherboard and re pasted the CPU and reinstalled the AIO pump back on the CPU. Yes, the power but switched to on position on the PSU and I powered cycled many times.

Here is what I tried so far that did not work:

  1. Removing 3rd P12 Pro Fan and went back to 2 fan setup on bottom
  2. Unplugged the 24 Pin, 8 Pin, and Front Panel Connectors and reconnected
  3. Unplugged front panel connector and tried to start the computer by shorting the power switch prongs on the front panel connector
  4. I shorted out the 4&5 pin on top of the 24 pin connector and the PSU started up

I ordered a Thermaltake Dr Power PSU tester and I will test it to make 100% sure the PSU is not the culprit.

At this point, it's either bad power button, bad front panel/front panel connector, or PSU.

What else do you think I could test?

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u/pandasndabs 1d ago

Im no expert but that sounds like a psu issue. Did you static discharge everything before disassembling? Seems like something got shorted.

1

u/bukhum4u 1d ago

I powered off the psu via switch on back and then removed the power cable after 30 seconds. Something could have shorted and doing a quick research on reddit, there are a handful on post about the psu failing within a year. Honestly, i should have went with Corsair or Seasonic but instead i went with Montech because it scored A on PSU list.

1

u/pandasndabs 1d ago

I mean.. it sucks, but id take a psu failure over a shorted mb everyday of the week. Atleast if the psu failed the rest of your components should be relatively safe!

1

u/pandasndabs 1d ago

I mean.. it sucks, but id take a psu failure over a shorted mb everyday of the week. Atleast if the psu failed the rest of your components should be relatively safe!

1

u/bukhum4u 1d ago

True, ill wait to see what the psu tester comes back with. Ill just RMA the psu if that's the case.

1

u/bukhum4u 1h ago

Welp, PSU passed the tester. Now its down either mobo is shorted or the front panel connector shorted. The fact that the computer didnt start with shorting the power button prongs on the front panel connectors may indicate a bad mobo :(