3 No sign of power on logic board, no chime, no fan spin
MacBook pro-2015 won’t power. Client claimed he shut it down and disconnected from power supply night before, but the next morning, he tried to power it on, nothing comes on.
Have tried all key sequences, from SMC reset to NVRAM. No power still.
Here is what I found on the logic board.
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PS: I’m open to technical solutions. I have little skill using OpenBoard, I have also downloaded the board-view along with a schematic diagram of the system.
Thanks
Update (08/12/2020)
@danj This is how far I can zoom the infected area.
Also, I have reviewed the link but haven’t done any cleaning yet.
Update (08/12/2020)
@danj Am done with cleaning corroded area. I’m yet to connect to power. Wanted you to have a look before doing anything I will regret later on.
Update (08/14/2020)
@danj broken coil I guess
Update (08/14/2020)
@danj While checking power rail, I observed PP5V_S3_ALSCAM_F which are the three components I pointed are missing. The logic board is A1502 820-4924. Also, note that this is part of the corroded area.
what other diagnosis do you suggest I carry out?
Thank you for your help.
좋은 질문 입니까?
329 
970 
@omiran - Any luck on getting a better picture of the damaged area (blue/green stained area)?
Did you review the link I posted?
Dan 의
@omiran - Sadly you'll need to patch up some of the traces and it looks like a few SMT devices are damaged or missing. After cleaning lets get another shot like your second one. Are you up to micro-soldering?
Dan 의
@danj yes, I'm up to micro-soldering. will do the cleaning and revert with new pictures
habeeb hassan 의
@danj have checked around the board and I noticed that P5VS0_EN is 0V. C8187 pin 1 to P5VS0_EN reads 0V. R8187 pin2 also reads 0V. U8080 pin 2 also reads 0V.
U8180 is the water affected area with its pin 4 reading 0V. R8167 pin 2 reading 0V.
I'm confused here identifying which logic gate between U8080 and U8180 receives the P5VS0_EN first before I change the wrong logic gate?
habeeb hassan 의