Over current mod,

not varified and theory only.

resistor marked 59c, to the very top of board, in the middle of a bank of 5. middle of the ISL6232 chip then head up puts you about correct.
The resistance should be about 40K (its a 40K2 resistor) try nudging this down a little and you should see the v-core drop and the max current drop also (eg now gets even worse) - if someone brave can confirm this with pencil mod then thats the simpleish fix - replace this resistor with trimpots letting you nudge this value up and down from here. pushing resistance UP should raise v-core and OCP limit. down reducing both.

At your own risk!
Not Varified!
Calculated from Pages taken from datasheet for the IC and from much digging about with a cheap multimeter and 5 year old A-level electronics. so dont hurt me if im wrong