TEKKies MBpro not charging -on battery, works fine R7005 & U7000 boil
Dearest Forum !
i have above mentioned computer (from my sister) wishing to repair.
820-3115 i have schematic and boardview. and im learning how to use them.
Power Rail PP3.42 is present. No short to ground.
No Power from SMC_BC_ACOK. from onewire.
thus no green light,
I checked isl6259 wich is getting really hot.
I used Louis (thank you man - you are inspiring !!) method wit isoprop alc. on the board to see evaporation -
isl is getting really hot and r7005 is almost boiling.
i had a reading of 400ohm on R7005 wich is supposed to be 20ohm. replaced it with a 22ohm for testing...
its burning again. i have a new isl6259. should swapping the isl this fix the prob?
just got a hot air station, an oszilloscope etc because i want to fix this.
ive been experimenting with old ram modules to test hot air - and didnt want to get on the "good" board yet with the isl6259. changing r7005 with hot air was the first thing i did on the board... looks so easy when louis is soldering chips. its f.... hard work,
i will learn. need the right calibr. for the hot air... flow and temp. then all will be fine,
will it help to replace isl6259? or am i overlooking something?
thnk you so much for all information!!!