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Macbook A2337 820-02016 PPBUS 12.3V

Thread starter Instafixx
Start date Apr 1, 2026

Instafixx

Active member

#2

I replaced U7700. But still L7800 heats up.
With L7800 connected PP3v8_aon_vddmain is 1.5V
With L7800 removed its 3.8V

2informaticos

Administrator

Staff member

#3

Replace L7800 and test again.

Instafixx

Active member

#4

Replaced L7800. Still the same. Removed the coil.
Injected 1V at SPMU_BSTLQ_LX drawing .500 amps.
U7700 heats up.

Instafixx

Active member

#5

PP5V_BSTLQ_VOUT_SPMU was shorted.
Replaced the cap and also placed a coil L7800

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