MacBook Pro A1278 Board-only No power repairs
Автор: Reset Lab
Загружено: 2023-05-20
Просмотров: 855
Описание: In this repair, the customer sent board only and it came in for no power. Firstly we connected the charger, but there was no LED on the charger , while going over the basic power rails , we checked PPDCIN VOLTAGE, then PP3V42 these were present, and then PPBUS_G3H , however this rail was missing , we didn’t bother to check for a short to ground on the PPBUS_G3H which we would have done next in a case of a missing standby rail, but because we didn’t have the LED on the charger , we connected it to the isl( battery and charger ic) then we went straight to remove the isl, and then checked, and now we have LED on the charger , then we replaced it, and that solved the issue.
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