No liquid damage.
UF400 was getting warm as PP3V3_UPC0_LDO was shorted.
Replaced UF400 from a donor board (same location).
Short is gone but stuck at 5V. Goes to 0.24A and after a few seconds drop to 0A and stays at 0A.
Because UF260 is also on PP3V3_UPC0_LDO firstly I re-flashed UF260 with the same .BIN file but no luck.
Then I swapped UF260 from the same donor board and still no luck so soldered original UF260 back.
With charged battery MacBook turns on - no issues. Just wont charge.
Readings - diode mode | voltage
UF400
PP3V3_S2_LDO - 0.444 | 3.3V
PP1V5_UPC0_LDO_CORE - 0.490 | 1.54V
PP3V3_UPC0_LDO - 0.471 | 3.23V
PP1V8_UPC0_LDO - 0.514 | 0V (on known good board I have 0V as well)
UF500
PP3V3_S2_LDO - 0.444 | 3.28V when 0.24A from charger and when 0A on charger then 0V (on UF400 even when at 0A I have 3.3V)
PP1V5_UPC1_LDO_CORE - 0.495 | 1.53V
PP3V3_UPC1_LDO - 0.480 | 3.21V
PP1V8_UPC1_LDO - 0.538 | 0V (on known good board I have 0V as well)
U5500 LDOs in diode are are correct as well.
I have another board which is fully working to compare reading.
UF400 was getting warm as PP3V3_UPC0_LDO was shorted.
Replaced UF400 from a donor board (same location).
Short is gone but stuck at 5V. Goes to 0.24A and after a few seconds drop to 0A and stays at 0A.
Because UF260 is also on PP3V3_UPC0_LDO firstly I re-flashed UF260 with the same .BIN file but no luck.
Then I swapped UF260 from the same donor board and still no luck so soldered original UF260 back.
With charged battery MacBook turns on - no issues. Just wont charge.
Readings - diode mode | voltage
UF400
PP3V3_S2_LDO - 0.444 | 3.3V
PP1V5_UPC0_LDO_CORE - 0.490 | 1.54V
PP3V3_UPC0_LDO - 0.471 | 3.23V
PP1V8_UPC0_LDO - 0.514 | 0V (on known good board I have 0V as well)
UF500
PP3V3_S2_LDO - 0.444 | 3.28V when 0.24A from charger and when 0A on charger then 0V (on UF400 even when at 0A I have 3.3V)
PP1V5_UPC1_LDO_CORE - 0.495 | 1.53V
PP3V3_UPC1_LDO - 0.480 | 3.21V
PP1V8_UPC1_LDO - 0.538 | 0V (on known good board I have 0V as well)
U5500 LDOs in diode are are correct as well.
I have another board which is fully working to compare reading.