MacBook Air A2179 Not turning on, pulling ~180-220 mA then going down to 20 mA at 5V repair

Problem description
MacBook not turning on, 180-220 mA usage before going down to 20 milliamps, P5VG3S_EN missing. All rails below PP5V_G3S are present.

Symptoms

 * MacBook not powering up.
 * Drawing 180-220 mA then going down to 20 mA at 5V as measured by a USBC meter.
 * P5VG3S_EN missing.
 * All rails below PP5V_G3S are present.

Solution
The PMIC is dead, U7800 (Figure 1). Replace it.