Acer Aspire E5-772 not charging

First of all I would like to say hello to everyone in this Forum!
Though I do not understand Polish, I still hope that I am welcome here despite using English
as means of communication.

I am trying to fix an Acer E5-772-31L5 notebook which isn't charging.
The mainboard has the description Brook_BH MB 14276-1M
448.04X08.001M

The notebook runs Windows 10. Windows battery error shows "0% Plugged in but not charging". The orange charging led was flashing in the initial state. After fixing broken tracks, SDA and SCL lines from charger IC BQ737 via 33 Ohm resistors to the Battery connector, the charging led does not even light up! Still not charging.
Unfortunately, i am lack of a service manual to further troubleshoot the problem. I would be very thankful to obtain
some help as well as a relevant service manual.
Thank you in advance
Rein

You need to try simple things frist like diferente (known working battery) than check for liquid damage than probably replace BQ IC.

godzzila ha scritto:You need to try simple things frist like diferente (known working battery) than check for liquid damage than probably replace BQ IC.

Exactly, as the connector receptacle on the battery was found to be corroded, testing with a known battery was the very first thing I did.
After many hours of persistent troubleshooting, I was able to locate 2 further failure. Firstly, another track on pin 3 fron Battery connector going to SW1 was also broken. Secondly, resistor array PN4301 was also corroded underneath the soldering pads which led to bad contact on the tracks. The broken track was fixed and PN4301 replaced with 43 ohms array (reason being I haven't have a 33 ohm array in stock). Reflow was also done on U4404. Finally, attached AC adapter and inserted battery. The orange charging led lits and stay which means charging is working!! Battery charging was tested 2 cycles and every seems to work fine