Question My PC won't boot unless I flick the power supply on/off switch and then press the power button.

Jan 9, 2020
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Do you close the psu over night or for a longer time?
I do with mine and when i flip to on my pc starts fans and every thing for 1-2 sec and after 10 sec is opening in bios idk why i use an evga 1000w gq
 

araujo.tiago

Prominent
Sep 25, 2018
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Are you able to test te PS_ON signal pin on the ATX cable?

Disconnect it from motherboard, and with a paperclip (or something metallic) do a "jumper" between the PS_ON and any COM pins (you can check them here: https://upload.wikimedia.org/wikipedia/commons/thumb/a/a9/ATX_PS_signals.jpg/250px-ATX_PS_signals.jpg )

If the PSU starts, it can be something related to its startup, and the possibilities are: faulty PSU, faulty MOBO, discharged CMOS battery, faulty Power On button. You will need to search by elimination.

If the PSU does not starts, its a faulty PSU.
 

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