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

Problem description

 * 1) incomplete

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).