| MacBook Pro A1708 Not turning on, pulling 0.35A at 20V repair | |
|---|---|
| Device | MacBook Pro A1708 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station, thermal camera |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering, Micro-Soldering"Micro-Soldering" is not in the list (Soldering, Teardown, Part replacement, Cleaning, Software, BGA, General) of allowed values for the "Repair Guide type" property. |
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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.
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.