MacBook Pro A1708 Not turning on, pulling 0.35A at 20V repair

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MacBook Pro A1708 Not turning on, pulling 0.35A at 20V repair
Device
Affects part(s)
Needs equipment
Difficulty
Type


Problem description

#incomplete

Provide a concise description of the issue here. Be as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing.

Example image (Figure 1) -- No image yet. Help expand this page by uploading it!

Symptoms

  • Not turning on
  • Pulling 350 milliamps at 20V as measured by a USB-C meter

Solution

PP5V_S5 missing — check and reflow or replace U7650 (TPS51980) with proper pads cleaning (especially on the PPBUS_G3H_P3V3S5 input of U7650). Possible problem: Apple refurbished board; solder over corrosion causing bad joint. Example of replacing a corroded TPS51980

Dead CPU or bad BIOS can also present like this.

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