MPB 2015 820-00138 PPBUS_G3H short

[MicroSMD Lab]

Device came in previously for right side fan not working and randomly shutting down. I replaced the right side fan socket (was burnt) and changed the 3 CPU mosfets since they are the usual suspects and all went well. A week after the customer said it won't boot. He also said the charger will light only if he connects it to another macbook first. A couple days after he said it booted and eventually it stopped booting but charger lights were green to orange.
I opened it up and L7130 is 0.5ohm to gnd. The board is still in and thermal camera shows U7310 heating up with charger connected/ battery disconnected but it does not "feel" hot. PPVIN_S5_HS_OTHER3V3_ISNS is also 0.5ohm to gnd. as is L7310, L7320, L7330. PPBUS_G3H to L7310, L7320, L7330 also measures 0.5ohm.
According to Mr. Rossman..... this is always a dead CPU.... I'm hoping he is wrong this time.

[reformatt]

Re: MPB 2015 820-00138 PPBUS_G3H short

Take off the CPU heatsink, do voltage injection at L7310 with 1V and check with thermal camera. I've yet to see a short on these low voltage rails that isn't a PCH or CPU so I'd say Louis is probably right.