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Macbook Pro 13 A1502(820-3476-A) Freezing

C

Ciki

New member
Hi Macbook start and chime then on login screen freeze , I try to boot in safe mode and its working ,it was liquid damaged and I replaced keyboard ,try use another ssd from working Macbook still same .
In diode mode I only see difference from working board is PP1V05_S0 line on working one I have 0.103K and broken one 0.072K I dont know s that normal .I guessing is something with graphic issue maybe
thx
 
Last edited:
larossmann

larossmann

Administrator
Staff member
Is a good and charged battery plugged in?

Was there some film residue from liquid around the RAM or the CPU? Was the corrosion by the CPU mosfets?

This is often fixed by an ultrasonic at 80c for a minute for me, dislodges the filmy junk around the RAM and under it that you cannot see.
 
C

Ciki

New member
Hi no liquid was only on keyboard and little bit around jtag connector ,remove connector and still same no corrosion around CPU and RAM ,will try ultrasonic later thx
 
D

dukefawks

Administrator
Pretty sure there is corrosion somewhere. Disconnect all stuff that is not needed like IO board, iSight, etc.
 
C

Ciki

New member
Fixed with all credits to Gurmon, replace with second screen and now works perfect,its very strange wish if someone can find reason WHY
 
C

Ciki

New member
Now I have sound problem no speakers output ,it was worked before ultrasonic now sound dead
 
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