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48
June 7th, 2025 23:10
Optiplex 7090 won't turn on after changing the CPU
I replaced the i3 processor with an i5, and it wouldn't power on. I tried putting the i3 back in, and it still wouldn't power on. Everything is properly connected, the socket has no damaged pins, the power supply is fine, and the few times it does power on, it either shuts off by itself or doesn't output video.
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ejn63
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June 8th, 2025 13:04
Unplug the system and hold the power button for 30 sec. Then retry the original CPU.
Jose Ruvalcaba
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June 9th, 2025 08:10
It worked, thank you very much, but now my question is why the PC doesn't want to post with the i5 if it is compatible and the processor is completely new?ejn63
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June 9th, 2025 10:48
What specific model i5 is it?
Jose Ruvalcaba
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June 10th, 2025 14:16
is a i5-10400...............................................
ejn63
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June 10th, 2025 14:21
That CPU should work - if it does not, it sounds like it's defective. Was the CPU a new one or a used one?
bradthetechnut
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June 11th, 2025 02:54
From above: "the processor is completely new"
Jose Ruvalcaba
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June 16th, 2025 05:43
@ejn63 is brand new, and work in another pc, i dont now why doesnt work in the optiplex is making me crazy
wazistu
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June 27th, 2025 16:19
Have you installed the most current bios driver?
what kind of ram do you have installed too?