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Galaxy S7 Edge no boot / no charge  

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TiptonRepair
(@tiptonrepair)
Eminent Member Customer
Joined: 3 years ago
Posts: 26
14/01/2020 7:31 pm  

Got in a strange one here...  Customer brought in their phone that was sitting on a desk and the screen all of a sudden started flickering and then the phone shut off.  The screen is not damaged in any way and the phone is not water damaged.  Tried new screen, new battery (charged to 60%) and I just tried another PMIC just to see if that fixed anything.  Pulls 0.09A from charger with or without the battery plugged in.  Could not locate any shorts / bad caps.  Customer just wants their data so I am trying anything I can think of to get the data besides chip off data which I am not sure I could pull off 😛


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TiptonRepair
(@tiptonrepair)
Eminent Member Customer
Joined: 3 years ago
Posts: 26
14/01/2020 7:42 pm  

Edit did not post, but the DCPS shows 0.07A at 3.98V connected at the battery connector when prompted to boot.  Removing the connection for prompt to boot instantly shows 0.00A.


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Mike
 Mike
(@admin)
Owner Admin
Joined: 5 years ago
Posts: 507
22/01/2020 9:22 am  

Well, now that you've replaced the PMIC, I would say that all bets are off because there are way too many variables at this point.  The most common issue that we've seen in these S7 Edges is the max77838 chip.  Diode mode all around that chip to see if there are any shorts.  We do not repair these anymore.


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TiptonRepair
(@tiptonrepair)
Eminent Member Customer
Joined: 3 years ago
Posts: 26
31/01/2020 6:08 pm  

Is a NAND swap possible on this phone?  I have a perfectly working S7 Edge AT&T with the same board setup.


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Mike
 Mike
(@admin)
Owner Admin
Joined: 5 years ago
Posts: 507
01/02/2020 7:46 am  

Doubtful, but chipoff  to an emmc reader might be possible.


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TiptonRepair
(@tiptonrepair)
Eminent Member Customer
Joined: 3 years ago
Posts: 26
01/02/2020 12:57 pm  

I was trying to find the correct eMMC reader, but not sure the size / pin pattern of this specific NAND.  If it were usable with other phones, it may be worth me buying...


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