820-02773 MacBook Air M2 dont turn on

[Dozer]

Hi have now the same problem like in

Thread '820-02841'

May 14, 2026

Hello,

Got this device, Fanspin, no display no trackpad clicking, no extern display, no caps lock led reaction. switches from 5 to 20 and later to 19.xxV like usually so power consumtion looks normal
DFU mode is possible but had no effect

customer told me yesterday still was ok, today not possible to turn on, no liquid...

checked and diconnected the angel sensor, tryed good display,

found PP5V_S2SW_USBC01 has 0V
but UPC01_5V_EN has 0 V

PPBUS_AON 11.96V without batterie only pluged in dcin
PP3V8_AON 3.79V
PP3V3_AON = 3.3V
PP5V_AON_P3V8AON = 4.99V

PP5V_S2_MAIN 5.13V
PP1V2_AWAKE...

• Dozer
• Replies: 5
• Forum: Macbook Logic Board Repair Questions

Fanspin, no display no trackpad clicking, no extern display, no caps lock led reaction. switches from 5 to 20 and later to 19.xxV like usually so power consumtion looks normal
DFU mode is possible but had no effect
found PP5V_S2SW_USBC01 has 0V
but UPC01_5V_EN has 0 V

PMU_SYS_ALIVE_1V8 is 1.8V
PP1V8_S2 is 1.8V

"wich signals needs to turn on UPC01_5V_EN ?"
It is driven high when external device is connected to corresponding port; it enables 5V output required by external devices.

the ampmeter goes from 5V to 20V then a bit later to 19.xx V

the second device on my table and ia am stuck in the same problem.

Neet realy help to diagniostic that problem

 

[2informaticos]

5V_S2SW only appears (on corresponding port) when external device is detected.
Your MLB behavior denotes that it doesn't detect any device.
Such 5V is not required in DFU, as the other Mac has its power supply.

Can you find all voltages from pages 108-111?