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 Post subject: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: November 18th, 2016, 18:13 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
Have an SSD from a Macbook Pro here that just gets hot and isn't recognized. Model is Samsung MZ-JPU256T/0A6. It went through ultrasonic cleaning already.

Attached are photos of an IC and area where I noticed corrosion. The IC is marked:
Code:
PSRI
4AK
A7HE


I believe it is this: http://www.ti.com/lit/ds/symlink/tps61086.pdf

Can anyone confirm this for me? None of those caps are short. Not too sure where to start otherwise.


Attachments:
YVmrEsa - Imgur.jpg
YVmrEsa - Imgur.jpg [ 4.57 MiB | Viewed 15634 times ]
w7lWe4b - Imgur.jpg
w7lWe4b - Imgur.jpg [ 4.66 MiB | Viewed 15634 times ]
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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: November 18th, 2016, 18:46 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
Also are the flex cables for M.2 or Apple SSD so that you can probe both sides of the board while its plugged in?


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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: November 18th, 2016, 18:56 
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Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
I believe you have correctly identified the IC. I would measure the boosted output voltage.


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Vboost.jpg
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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: December 5th, 2016, 19:20 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
I'm getting 11.95v. Known good measure 12.43v. Resistance to ground measure about the same, so I don't think it is short -- but would .5v be enough to make a difference?


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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: December 5th, 2016, 19:37 
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Joined: September 8th, 2009, 18:21
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Location: Australia
I'd be surprised if the difference was of any consequence.

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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: December 5th, 2016, 22:01 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
Any ideas on where to possibly go from here?


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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: December 5th, 2016, 23:27 
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Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
JGAN wrote:
Any ideas on where to possibly go from here?

Examine the other chips?

Look for a serial diagnostic port?

JTAG port?

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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: January 15th, 2022, 13:37 
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Joined: December 14th, 2020, 11:51
Posts: 50
Location: France
Hello,

I have a similar case. Where you able to recover data ? VBoost is 12.45V on mine.

Thanks
Claude


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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: February 1st, 2022, 8:26 
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Joined: March 11th, 2021, 10:13
Posts: 184
Location: Switzerland
I got two like this. Power looks ok, they got DRD- DSC but then get BSY as soon as I try doing something. One had liquid, the other one was working with USB adapter and stopped working.


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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: February 10th, 2022, 12:59 
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Joined: March 11th, 2021, 10:13
Posts: 184
Location: Switzerland
My findings to get into ROM mode but that's not very helpful in my case.


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ROM_Mode_Apple_SSD.JPG
ROM_Mode_Apple_SSD.JPG [ 34.4 KiB | Viewed 8605 times ]
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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: February 10th, 2022, 13:02 
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Joined: March 11th, 2021, 10:13
Posts: 184
Location: Switzerland
I've been looking at the board the only suspicious components I can find is this coil, It's open with probe on each side.


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Coil_ssd.JPG
Coil_ssd.JPG [ 139.1 KiB | Viewed 8605 times ]
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 Post subject: Re: Apple SSD (Samsung MZ-JPU256T/0A6) liquid damage
PostPosted: February 10th, 2022, 13:13 
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Joined: March 11th, 2021, 10:13
Posts: 184
Location: Switzerland
What is this ? Diode ?


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