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The March 2015 update of Apple's 13" MacBook Pro Retina Display, model A1502, features fifth-generation Intel Core i5 and i7 processors and introduces the Force Touch trackpad.

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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.

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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.

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Update (08/14/2020)

@danj broken coil I guess

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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.

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Beantwoord deze vraag Dit probleem heb ik ook

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Ja Nee
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@omiran - Any luck on getting a better picture of the damaged area (blue/green stained area)?

Did you review the link I posted?

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@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?

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@danj yes, I'm up to micro-soldering. will do the cleaning and revert with new pictures

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@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?

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At this point you don’t need the schematics or boardview drawings.

You need to clean off the spillage and the corrosion it caused. You likely have a messed up keyboard as well as the area you have the stain is underneath it. Ask iFixit: I Spilled Liquid on My Laptop—Now What?

Take a tighter picture of the damaged area alone so we can see more clearly the damage.

Update (08/14/2020)

Here’s a blowup of the area of a known good board (sorry its a bit grainy)

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I do see a few areas the traces look thin or damaged. It does look like what ever spilled didn’t do too much damage.

Cross your fingers and see if the system responds. Good Luck!

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Ja Nee
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1 Opmerking:

Seen! Every chip physically looks okay. But PP5V is giving 0V instead of 5V. I have added the image to my updated question, please check

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habeeb hassan zal eeuwig dankbaar zijn.
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