| MacBook Pro A1502 2013-2014 Not turning on (19.5 V 100–200 mA on charger) repair | |
|---|---|
| Device | MacBook Pro A1502 |
| Affects part(s) | Whole board |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
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Problem description
#incomplete
Symptoms
- MacBook not turning on.
- Only drawing between 100 to 200 mA on charge port.
Solution
As usual check PPBUS_G3HOT, PPVRTC_G3H, PP5V_S5
PP5V_S4 is 0 V (problem here)
C7320 has corroded pad so U7320 had no input on pin 6 so no Vcore was being produced on one of the power phases.
Redoing the corroded trace with a jumper wire and replacing the U7320 chip solved the problem.