Power supply voltage out of tolerance level?

Mar 22, 2018
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I'm trying to determine if my power supply is keeping my computer from booting. The computer was knocked on it's side and now I'm not getting any image on the monitor.

When I voltage tested the 24 pin connector, the 14th pin is supposed to have a -12 volt reading with a 5% tolerance. The reading is -11.23, .17 more than it should have for the tolerance, would that stop the computer from booting?

Also worth noting, when I turn on the power supply switch in the back, the motherboard automatically comes on, and if I hold down the power button to force shut it off, it powers back on after a few seconds.
 
Solution
Yes, not having the correct voltages can cause a PC can fail to start. The issue is that many other things can such as a damaged motherboard or graphics card can cause this too. No image output has many possible causes. If the PC suffered impact then I cannot say that replacing the PSU will work. If you actually got the PC to start then it possibly isn't the issue. If anything it would be gambling. If you do not have access to another PSU, motherboard, or GPU to try I would actually have a shop take the parts out of the PC and figure out which ones are broken. I think the motherboard may have suffered damage is my first thought.

jr9

Estimable
Yes, not having the correct voltages can cause a PC can fail to start. The issue is that many other things can such as a damaged motherboard or graphics card can cause this too. No image output has many possible causes. If the PC suffered impact then I cannot say that replacing the PSU will work. If you actually got the PC to start then it possibly isn't the issue. If anything it would be gambling. If you do not have access to another PSU, motherboard, or GPU to try I would actually have a shop take the parts out of the PC and figure out which ones are broken. I think the motherboard may have suffered damage is my first thought.
 
Solution