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Socket 7 Motherboard fix after psu fail

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First post, by Bernkastel7734

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Hello everybody,
So reccently I got old socket 7 system, it was based on ASUS P/I-P55TP4-XE. I was told that when someone tried to boot it, it blew fuses in his house. I think that someone tried to run PSU at 115V mode, and since I live in 230V region, psu went bad. The board itself does not look to be damaged( I mean no burns or blown elements), but there is a short on 12V rail. Do You have any tips on where to look for that short or does anyone seem to have any schematics for that motherboard?
Thanks for any help.

Reply 1 of 6, by snufkin

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There are some (5?) yellow tantalum capacitors around the PSU connector. One of those probably connects to +12 and they sometimes go short.

Reply 2 of 6, by Bernkastel7734

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Will check them

Reply 3 of 6, by Bernkastel7734

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Desoldered the capacitor on 12V rail, the capacitor is not causing the short, need to search for another cause

Reply 4 of 6, by Bernkastel7734

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Desoldered tantalum cap between ISA slots, it was shortened

Reply 5 of 6, by snufkin

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Nice. You should be able to check if the board's working without immediately replacing it, it's probably only smoothing the 12V supply for any ISA cards that need 12V.

Reply 6 of 6, by Bernkastel7734

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Replaced it, now the board works

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