- Aug 22, 2015
- 3
- 0
- 4,510
I' having a bit of a weird problem, I just bought a new PSU, but after installing it my computer shuts down after about 1,5 seconds, the fans barely have time to spin up. I tried removing all the cables from the motherboard and PSU, so that I'm left with only the MB, CPU and GPU power connected. Still no luck.
Thinking I might have screwed something up in the installation process I reinstalled my old PSU. With the old PSU back in play the computer started up with no problems.
At this point I'm thinking that the new PSU might be DOA, but before sending it in I try the new PSU in a different computer, but now, suddenly the new PSU works and the old computer boots up normally.
I've tried switching out the RAM as well, and I've tried using the MB's onboard power button.
(The two computers have very different components, but the biggest difference I can see, in regards to the power connections, is that the old computer has a 4-pin CPU connector and my main computer has an 8-pin connector.)
What could be the cause? Any suggestions would be much appreciated.
tl;dr:
Old PSU works in both computer A and B, new PSU only works in computer B.
Thinking I might have screwed something up in the installation process I reinstalled my old PSU. With the old PSU back in play the computer started up with no problems.
At this point I'm thinking that the new PSU might be DOA, but before sending it in I try the new PSU in a different computer, but now, suddenly the new PSU works and the old computer boots up normally.
I've tried switching out the RAM as well, and I've tried using the MB's onboard power button.
(The two computers have very different components, but the biggest difference I can see, in regards to the power connections, is that the old computer has a 4-pin CPU connector and my main computer has an 8-pin connector.)
What could be the cause? Any suggestions would be much appreciated.
tl;dr:
Old PSU works in both computer A and B, new PSU only works in computer B.
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