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820-00165 only run from battery when U7100 heat up

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BCN_Techs

Member
Got this board with water damage (lightly). PPBUS was 8.20 so i changed 8.60 and now it is turning on. After that the battery wasnt detected and ISL 17/18 wasnt ok, so i changed it too.

Now when u7100 area is a little hot it is starting and detecting battery and run from battery, but if it is cold, the battery is detecting than not detecting ( on login screen it is changing from "X" on battery icon to 100% sometimes 1%, sometimes 7% every 2-3 seconds).


P.S. SMC had been changed twice from donor good know board, ISL6529 first i installed new one, than take another from donor board.
 
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BCN_Techs

Member
Forget to tell that already checked R5380/81. Resistance are ok, and diode mode is 0.530 on both and voltage 3.42V (pulsing 3.42-3.44 every second)



Checked that when U7100 is hot and board run from battery, the diode mode is 0.480 . Any idea what does it mean?
 
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BCN_Techs

Member
no, light is stable. Anyway when i try to run from battery i dont connect LIO board ( all procedure described was done without LIO board connected)
 
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BCN_Techs

Member
I am not trying to charge the battery. I try to run from battery. Anyway even conected and good known LIO the issue is the same. When board is hot it is working ok but when cold not running from battery
 
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