[SOLVED]820-3437 ISL6259 CHGR_UGATE, CHGR_LGATE not driving switching MOSFET(s)

[G.Beard]

820-3437 No power on.
Green / Orange light.

Voltages around ISL6259:
PPBUS_G3H (CHGR_PHASE pin 23) = 3.8V
CHGR_UGATE pin 24 ~ 4V
CHGR_LGATE pin 21 = 24mV
CHGR_ACIN pin 3 ~ 5V

Already tried changing Q1730 with no change.
My Googling skills seem to be lacking somewhat. Can't find any datasheet on the ISL6259 so I will start measuring all values around the IC.


Would someone clue me in on what I should be checking for please?

 

[G.Beard]

Thanks to louis for the youtube and thanks to everyone giving thier time and knowladge.

Boards a worker. There were no S0 enables so I injected S0 enable 3.3v but still no S0 rails turning on. Turns out the fault was U1900 had been soldered to the board incorrectly!
All of these boards are from a company that buys from a company the "refurbishes" damaged Macbooks and laptops. This is not a small company so it begs the question of who are they employing to fuck shit up even further... 80% of the boards have been ruined by a moron and after 3 months of board repairs I am fixing 90% of what they can't, plus undoing thier stupidity. What's up with that.

Again, thank you