MacBook Pro A1990 Charger not turning on USB-C meter repair

Problem description
When charging the A1990 MacBook with a USB-C charger and measuring the input current and voltage with a USB-C meter, the meter does not even turn on at all or 0 current.

Symptoms

 * MacBook not turning on.
 * All voltages missing.
 * Not charging.

Check PP20V_USBC and PPDCIN_G3H resistance

 * Measure the resistance between PP20V_USBC and GND with a multimeter on resistance mode
 * if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
 * Measure the resistance between PPDCIN_G3H and GND with a multimeter on resistance mode
 * if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below

Faulty USB-C port
If both rails above are not shorted, it is highly likely that the USB-C port itself is shorted or damaged inside.

Short on PP20V_USBC or PPDCIN_G3H
How to find short circuits


 * Inject 1V to the shorted rail using a Lab Bench Power Supply.
 * With a thermal camera, identify the source of the short, most likely it is a capacitor
 * Replace the shorted component.

Shorted USB-C port
Replace the offending port.