Alex Thayer
Member
820-01700-05 light liquid damage, concentrated on U9580, U9500, U3100, and U3200.
Reflowed U3100, U3200.
Reballed U9580, U9500.
Verified 20V on all 4 USB-C ports.
Current steadily climbs until peaking at 0.31A 20V before suddenly dropping off to 0.01-0.03A 20V, and remains steady there perpetually.
Trackpad clicks when connected, keyboard is screwed up so not testing with that, otherwise no other signs of life.
Worked through the power on sequence at:
Everything is fine until PP3V3_S5 never comes online. The PMIC does not appear to have been hit, so I'm guessing this is a logical issue elsewhere? I skipped testing PMU_ONOFF_L because that's going to be a PITA with my equipment, but can do so if it's particularly relevant.
Liquid damage was quite light, tested all affected caps, no shorts, and no passives were even damaged severely enough to need replacement.
What should I do from here?
Reflowed U3100, U3200.
Reballed U9580, U9500.
Verified 20V on all 4 USB-C ports.
Current steadily climbs until peaking at 0.31A 20V before suddenly dropping off to 0.01-0.03A 20V, and remains steady there perpetually.
Trackpad clicks when connected, keyboard is screwed up so not testing with that, otherwise no other signs of life.
Worked through the power on sequence at:
820-01598 Power On Sequence.pdf
drive.google.com
Everything is fine until PP3V3_S5 never comes online. The PMIC does not appear to have been hit, so I'm guessing this is a logical issue elsewhere? I skipped testing PMU_ONOFF_L because that's going to be a PITA with my equipment, but can do so if it's particularly relevant.
Liquid damage was quite light, tested all affected caps, no shorts, and no passives were even damaged severely enough to need replacement.
What should I do from here?