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I am at a bit of a loss. Before replacing u7650 today I powered on the board to do some more tests quick.
Next thing you know I smell electrical and it appears U7800 fried. No idea why. Anyways, PPBUS_G3H is now gone and short to ground. Can this BGA chip even be replaced?
Out of a 2017 MBP. No history on board.
U7650 and surrounding does show some signs that someone before me had attempted some repair.
PPBUS_G3H - 13.04V
PP3V3_G3H - 3.4
PPDCIN_G3H - 0
Suggestions on where to start?
Sorry guys maybe I didn't explain the issue correctly. I'm well aware what a flashing folder means. I do not have a drive installed. The issue is the computer will power down by itself and then back on every 10 seconds or so.
Im led to believe it may be an issue with the u7100 area...
Got in a 2015 MacBook pro Retina with supposed liquid damage. Believe prior person may have cleaned because I cannot find any corrosion.
MacBook powers up to flashing folder and within 10 seconds it reboots. Using genuine charger. Any suggestions on where to start?
I have a 2.2ghz i7 board that I'm hoping to fix. Overall the board is very clean. Mag safe goes from green to orange.
PPBUS_G3H - 8.56
PP3V42_G3H - 3.41
PP5V_S5 - 5.00
PP5V_S4 - 5.00
PP5V_S3 - 0.00
PP3V3_SUS - 3.32
PP3V3_S5 - 3.32
PP3V3_S4 - 0.00