MacBook Air M2 A2681 820-02536 short on PP5V_CHGR

[mgladin]

Hello!

I am looking at a MacBook Air M2 A2681 820-02536 that came in not charging. When I plugged the MagSafe charger in, there was no light, and USB-C did not work either. I tried replacing the battery just in case, and that did not work. I pulled up the boardview file and started checking the connections at the battery connector and found a short on PP5V_CHGR. I initially checked in diode mode, and when that showed shorted, I switched to ohms and found that it measured at 0.3ohms, indicating a short. Boardview shows PP5V_CHGR goes all over the board, so I have no idea where to even begin trying to chase it down. No signs of water damage, did not want to inject voltage since the APU and NAND were highlighted.

 

[2informaticos]

Only few points on PP5V_CHGR.

Is the short at C5360, or C5277?

 

[mgladin]

They read at 0.3ohms on the PP5V_CHGR side, but the other side does not present a short. PP1v8_AWAKE show 7Mohms on C5277 and PP3v8_AON shows 300kohms on C5360

 

[2informaticos]

???!!!
What schematic used there?

C5360 is connected to PP5V_CHGR, not to 3V8_AON!
Also C5277 is connected to PP5V_CHGR_VDDP, not 1V8_AWAKE!

"They read at 0.3ohms on the PP5V_CHGR side"
No idea how to interpret this; one side of capacitors is connected to ground.
I hope you didn't waste the time checking from GND to GND.

BTW, use diode mode, with red probe connected to ground!

A2681 - 820-02536.rar

drive.google.com

 

[mgladin]

I was looking at the same brd file that you just sent me. Am I missing something or just being dumb?

 

[mgladin]

After looking at the schematics (which admittedly I am not very good at reading or understanding), I think the boardview has PP5V_CHGR and GND mixed around or combined?