A1932 2018 - 2019 MacBook Air

Logic board part number: 820-01521

{|class="wikitable" ! style="text-align:left;"| Problem ! Solution
 * No Power, SLPS2R Voltages good, P5VG3S_EN missing
 * Also had a bad battery cause no display to LCD and fan at full speed(Make sure you always try without battery)
 * Maybe T2 Firmware corruption. Try DFU Mode Restore
 * Also had a bad battery cause no display to LCD and fan at full speed(Make sure you always try without battery)
 * Maybe T2 Firmware corruption. Try DFU Mode Restore


 * No Power, 5v on charge port 0-300mA
 * Check if PP3V3_G3H has 3.3v
 * Check if PP3V3_G3H has 3.3v
 * Check if PP3V3_G3H has 3.3v

On this video there was corrosion on the capacitors around Q7660, resoldering the area fixed the problem: https://www.youtube.com/watch?v=FpNitLBUuYI


 * Corroded capacitors on PPBUS_G3H line next to speaker output connector.
 * Software updated required when booting
 * DFU mode procedure using App store app
 * DFU mode procedure using App store app
 * DFU mode procedure using App store app


 * Running slow/fans high
 * Try a known good battery.
 * Try a known good battery.
 * Try a known good battery.


 * Black screen, power cycling.
 * The heatsink was upside down (180° rotated) so it could not make good contact with the cpu. Due to overheating, the screen was not turning on, although the machine was drawing 1-2A on for 10-20 seconds. Rotating the heat sink 180° to the normal position fixed the issue. Screen turned instantly on when powering on.
 * Sign of dead T2 chip(unfixable at the moment)
 * Check L7813 for a short - this is a data line from the T2. Most of the time that it is shorted to ground, T2 chip is dead.
 * -}
 * Sign of dead T2 chip(unfixable at the moment)
 * Check L7813 for a short - this is a data line from the T2. Most of the time that it is shorted to ground, T2 chip is dead.
 * -}