MacBook Air (Retina, 13-inch, 2019) A1932
Part Number: 820-01521
Problem: does not turn ON, no light on LCD, no fan spin
Board: looks pristine, no liquid damage or corrosion
Power on USB PowerMeter with battery disconnected:
5.12V/7mA when power connected to USB-C port A
5.08V/300mA when power connected to USB-C port B
Voltages:
PP20V_USBC_XA_VBUS: 5.16V
PPDCIN_G3H: 0V
PP3V3_G3H_RTC: 0V
CHGR_EN_MVR: 0.08V
PPBUS_G3H: 0.054V
Fuse: F3000 and F3010 good
Resistance measurements:
F3000 to GND: 28Kohm
F3010 to GND: infinite
Part Number: 820-01521
Problem: does not turn ON, no light on LCD, no fan spin
Board: looks pristine, no liquid damage or corrosion
Power on USB PowerMeter with battery disconnected:
5.12V/7mA when power connected to USB-C port A
5.08V/300mA when power connected to USB-C port B
Voltages:
PP20V_USBC_XA_VBUS: 5.16V
PPDCIN_G3H: 0V
PP3V3_G3H_RTC: 0V
CHGR_EN_MVR: 0.08V
PPBUS_G3H: 0.054V
Fuse: F3000 and F3010 good
Resistance measurements:
F3000 to GND: 28Kohm
F3010 to GND: infinite