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

From Repair Wiki
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).