ISL6259 area was fucked. looks like someone gave it a good blowjob with an hot air gun on hi flow and blew shit everywhere. resistor where a cap was supposed to be and so on. dare i say the original fault all along was probably the battery. out of 6 batteries i had they were all broken lol. i tested it with a 13" battery and what do ya know??? it started charging.
Thanks once again, this job is done! as for the failing GPU whos gives a daam, some customers love thier shit so much they will literally use it to the death. so long as they are aware of the issue then thats all thatr matters.