Known-good test case, known-good BIL assembly/cable, battery is detected by board, charges fine, and the BIL LEDs all light up appropriately when a charger is connected, but the actual button function does not work--it does not prompt the LEDs to light up to show the charge level indication, etc. There was liquid near the SMC, and this is the only issue (it's for a board to be sold as refurbished, so we want it 100% functional). All other functions work fine. I checked a few resistors related to SMC_BIL_BUTTON_L, but they all measure out fine. Connector itself looks fine.
Is there anything else I can check before reflowing/pulling the SMC to check for gunk?
Is there anything else I can check before reflowing/pulling the SMC to check for gunk?