Working on an 820-3332 with no power; s5/g3h/3v42/vrtc all present, but found PM_SLP_SUS_L missing...oh no. PP3V3_S5_PWRCTL present at C7940. SMC_BATLOW_L is present at Q5040.
At Q5040 things are a bit weird, and I checked several times (a dozen+). Sometimes when I measure Q5040, pin 1 and pin 2 are both .522v and pin 3 is 3.3v, all stable. Other times, pin 2 cycles from .017v to .202v, and pin 1 cycles from .188v to .228v. Pin 3 (SMC_BATLOW_L) is stable all the time at 3.3v. Diode readings at Q5040 match a working board. No battery connected of course, but a working board has 3.3v on all three pins of Q5040, so I assume I don't need a battery to figure out the issue that's present. Changed Q5040 and U7940 "just because".
PM_SLP_SUS_L missing scares me since it comes from the PCH. Any help appreciated--thank you in advance as always!
At Q5040 things are a bit weird, and I checked several times (a dozen+). Sometimes when I measure Q5040, pin 1 and pin 2 are both .522v and pin 3 is 3.3v, all stable. Other times, pin 2 cycles from .017v to .202v, and pin 1 cycles from .188v to .228v. Pin 3 (SMC_BATLOW_L) is stable all the time at 3.3v. Diode readings at Q5040 match a working board. No battery connected of course, but a working board has 3.3v on all three pins of Q5040, so I assume I don't need a battery to figure out the issue that's present. Changed Q5040 and U7940 "just because".
PM_SLP_SUS_L missing scares me since it comes from the PCH. Any help appreciated--thank you in advance as always!