MacBook Pro won't power on

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Someone brought a MacBook Pro Core 2 Duo to the computer repair shop I work at. Originally they wanted a hard drive upgrade, but it seems to be having other problems. The other technician reported a burning smell when he tried to turn it on. It will stay on for at most 3-5 seconds then shuts off, and every attempt to power it on after that will be even shorter. I know this model has a known-to-fail NVidia GPU, but it seems unrelated to the problem.
 

chscag

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Your Mac's Specs
2017 27" iMac, 10.5" iPad Pro, iPhone 8, iPhone 11, iPhone 12 Mini, Numerous iPods, Monterey
If the tech smelled something burning, that should be clue enough to indicate there's a short somewhere. Power supply, logic board, ??? Probably a good idea to notify the customer and pass along the bad news.
 

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