Question My pc wont boot

CHAKA17

Reputable
Jul 22, 2017
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Just started my pc for the first time in almost 4 months and it booted perfectly fine, yet when i started it again the nixt day it didn’t, tryed the Mobo mimory it wasent it, so i took it the shop who narrowed it down to the cbu and the motherboard but he says its the motherboard how would i make sure its it before i buy one?

And i just bought a power adabter to shift power from 127 to 220 could it be the reason why the mobo is ruind?