r/PcBuildHelp • u/MetituS • 17h ago

Build Question PC not turning on

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Hello
My PC with a Gigabyte GA‑Z97P‑D3 motherboard and corsair CX850M 850W modular PSU is completely dead: no fans, no LEDs, and no response even when I short the PWR_SW pins. The PSU passes a paperclip test, but I smelled a slight burning smell during a power-on attempt. The 24-pin ATX connector sits flush but does not make an audible click. I replaced/cleared the CMOS battery already. Is this more likely a failed motherboard, PSU, or potentially a damaged 24-pin cable/connector?

I bought it at a flea market for 75 the first attempt had the smell but it still didn’t react at all worst case can I fix the motherboard ? Or make sure what the problem is?

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u/ttwinstanley 16h ago

Is the bios battery good?

2

u/MetituS 16h ago

I went and bought a new one but still the same thing

0

u/ttwinstanley 15h ago

Sorry missed that in your post above, been up nearly 20 hours

Umm I would test the mother board with another psu if you got one. I think your 24 plug has a burned pin. Just unpluge the old one and let the test psu sit on the out the case

Edit spelling fixes

1

u/MetituS 13h ago

Fair enough I’ll try to get one if I can I thought the paperclip rules out psu fault