820-00840 arrived with water damage on backlight circuit and U7650. Rest of board was spotless. Replaced U7650 and two capacitors that were affected by the spill but board still does not power on. U3200 and U3100 were spotless but still reflowed them to rule out. PPDCIN only 0.35V on pin 2 of R7020 but R9920 is 5.20v