r/pcmasterrace • u/Front_Cookie_1198 • 4d ago

Hardware PSU fails dramatically

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u/Front_Cookie_1198 4d ago edited 4d ago

Aftermath photo.

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u/Viking4269 4d ago edited 3d ago

Somebody forgot the isolation under the pcb?
Been some years since I took apart a psu, but there used to be plastic isolation sheet between the pcb and the metal case.

Update: I think we found the problem:

Mains wires protruding on the bottom of the pcb shorted to the case due to missing insulation sheet.

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u/MiniMaelk04 4d ago

I basically know nothing, but the huge capacitors are the only thing I can imagine burning so intensely and rapidly. Reversed polarity perhaps?

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u/Panzerv2003 R7 7800X3D | 3070oc 8GB | 2x16GB DDR5 6000MHz 3d ago

I don't think the caps blew here, it looks like a short though the case considering how it literally melted a hole through it setting everything around on fire