this board has been worked on by someone else before, U7000 looks newer and they put a resistor between c7041and c7040
magsafe green light comes on, but won't charge (no PPBUS_g3H) unless i hook up a charged battery, then will actually power on. but won't power on with battery only
all current sense resistors look ok
i get 20ish ohms resistance between pins 17/18 and 27/28 on U7000
adapter sense is 3.3V but looks like something keeps trying to pull it down to 3.15 when I check SMC_BC_ACOK on U6900 and U6901
is it the ISL or something else?
magsafe green light comes on, but won't charge (no PPBUS_g3H) unless i hook up a charged battery, then will actually power on. but won't power on with battery only
all current sense resistors look ok
i get 20ish ohms resistance between pins 17/18 and 27/28 on U7000
adapter sense is 3.3V but looks like something keeps trying to pull it down to 3.15 when I check SMC_BC_ACOK on U6900 and U6901
is it the ISL or something else?