Optiplex 7090 won't turn on after changing the CPU

Question

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.

ejn63 · Answer

Unplug the system and hold the power button for 30 sec.  Then retry the original CPU.

Jose Ruvalcaba · Answer

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 · Answer

What specific model i5 is it?

Jose Ruvalcaba · Answer

is a i5-10400...............................................

ejn63 · Answer

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 · Answer

From above:  'the processor is completely new'

Jose Ruvalcaba · Answer

@ejn63​ is brand new, and work in another pc, i dont now why doesnt work in the optiplex is making me crazy

wazistu · Answer

Have you installed the most current bios driver? what kind of ram do you have installed too?

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Optiplex 7090 won't turn on after changing the CPU

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