820-4924-a Not charging

[zcinciev]

Powering on not charging. The board was liquid damaged even on the battery itself. After some time working on it i managed to power it on and i ordered a new battery. When plugged in working normal all good once i plug in the battery it changes to battery and not charging and the green light not turning off even when battery plugged in and it came to that after i replaced U7100. Any ideas?

Thanks

 

[2informaticos]

I recommend to try known good battery; better old original, just for test.
New chinese battery too many crappy.

 

[zcinciev]

i tried but still the same. In the meantime U7100 burned so it stopped powering on, After replacing it with another one it power on but it's overheating U7100 cannot touch it.

 

[2informaticos]

Post U7100 voltages...

 

[zcinciev]

pin 1 0v
pin 2 16.3v
pin 3 3.9v
pin 12 3.4v
pin 14 3.4
pin 19 & 20 5.5v
pin 24 16.4v

 

[2informaticos]

PPBUS_G3H voltage and diode mode to ground?
Resistance between pins 17/18 and 27/28 of U7100?
Also post voltage for pins 9, 15, 27.

 

[zcinciev]

i Was about ti but this morning found it dead not powering on going through the power rails again now
Edit: PPBUS_G3H Shorted ... Q7130 was the issue hopefully now it's gonna be good

All good Charging with the replacement of the Q7130 that was the issues all along

Thanks 2informaticos