MacBook Pro A1502 Not turning on (80 mA current draw) repair

Problem description

 * 1) incomplete

Symptoms

 * Not turning on.
 * Only drawing 80 mA from the charge port.

Solution
Corrosion at U1900 RTC (Real Time Clock) circuit


 * U1900 and C1910 were removed
 * Corrosion was removed
 * U1900 and C1910 were restored.

Example video