Hi there,
BOard came in and upon inspection, c7026 and c7050 were broken from board. I believe they must've caught on the edge of the battery when installing the logic and somehow just now finished off after some time as this mac was running for few months. Those have been replaced and so has the ISL (3 times now) as all other voltages around ISL seem correct and resistance looks good:
pin 1 - 0v
pin 2 - 16.5V
pin 3 - 4V
pin 9=0V
Pin 12 =3.4V
pin 13 = 3.1V
pin 14 = 0V
pin 17 =12.3V
pin 20 = 5.5V
pin 27= 16.1V
resistance pins 17/18 at ISL pins is 3.9 ohms and 27/28 is 21.6 ohms.
I noticed R7051 was discovered to be high and replaced and again did the same so not sure if that was related to bad ISL but seems to be ok now.
I replaced q7080 also. My best guess is there's detected current sense issue. SMC_BC_ACOK diode red to ground is .45V.,
BOard came in and upon inspection, c7026 and c7050 were broken from board. I believe they must've caught on the edge of the battery when installing the logic and somehow just now finished off after some time as this mac was running for few months. Those have been replaced and so has the ISL (3 times now) as all other voltages around ISL seem correct and resistance looks good:
pin 1 - 0v
pin 2 - 16.5V
pin 3 - 4V
pin 9=0V
Pin 12 =3.4V
pin 13 = 3.1V
pin 14 = 0V
pin 17 =12.3V
pin 20 = 5.5V
pin 27= 16.1V
resistance pins 17/18 at ISL pins is 3.9 ohms and 27/28 is 21.6 ohms.
I noticed R7051 was discovered to be high and replaced and again did the same so not sure if that was related to bad ISL but seems to be ok now.
I replaced q7080 also. My best guess is there's detected current sense issue. SMC_BC_ACOK diode red to ground is .45V.,