[SOLVED]A1534 820-00045 pita

[phuketmymac]

Hello,

We have received that MacBook retina 12" 2015 for servicing with a broken charging port.
Charging port will work but not lock the charging cable.
Other than that, Mac was working fine.

After pulling out the computer and replacing the USB-C cable, we can't get it to boot up with a new charging port.
Board gets hot but nothing on the screen,

If we put back the original USB-C port, it boots up.

One more thing, if we plug the cable to the audio board, it will never start as well.
We have also tried a new cable+audio board with no success.

So, to summarize, with audio cable/board plugged, board will never start.
With new USB-C connector+cable, won't start either but with old port, it will start.

Board looks clean under the microscope, no knock off components found.

I am just clueless with this board.

Has anyone suffered similar issues with these Retina 12" boards?

Thanks.

 

[dukefawks]

There are different cables, have you checked part numbers on them? Are they even known good? China picked them from the trash probably.

 

[phuketmymac]

After some test, we've found out that when the board 820-4049-A is plugged, PP3V3_S0 is shorted.
Parts number are the same.

We suspect that originally the cable 821-1910-A was bent and created a short. After plugging the new board with the faulty keyboard we did short the 2 different boards we had.

Anyone has the schematic for the Audio board 820-4049-A please?

 

[dukefawks]

No schematic for that. Either using the wrong cable or wrong board or the audio board is just dead. Cable not plugged in upside down?

 

[phuketmymac]

You got it. It was. These connectors/cables are confusing.
Same connectors but on the MLB, connections are facing down, on the audio board facing up.

My apologies.