MacBook Pro A1502 Not turning on (24–25 mA current draw) repair

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MacBook Pro A1502 Not turning on (24–25 mA current draw) 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

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Symptoms

  • Not turning on.
  • Pulling only 24–25 mA from the charge port.

Solution

  • PM_SLP_S4_L missing for random reason, thoroughly inspect clock chip, tiny specks of corrosion next to it can kill it. Sometimes shotgun replacement of the chip is a clean solution.
  • CHGR_DCIN_D_R shorted to ground.
  • Bad right I/O board. Unplug it, see if it works (short on 3.3 V or 5 V rail on the I/O board can cause this problem).
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