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USB meter stays at 20V and it shows some cycles from 0A up to 1A and then again from 0A up to 1A.
Cycle take around 10-15 seconds.
Trackpad is clickable but when there is drop from 1A to 0A for short time is not clickable.
Heavy liquid damage.
Client need data only.
Melted L8504 and display connected on display side.
Liquid damage on J5100, J3300, J6640, C6481 area, U7210, U7410, D3370 area.
With battery connected it take up to 2.2A and fans spin for short time on high rpm and then stop. And doing that every 10...
Lo liquid damage.
At first there was 5V and 0.45A from charger.
Found U9580 was getting hot and there was no short around that IC.
Replaced U9580 and its not getting hot anymore and board switch to 20V and wont boot.
PP2V5_NAND_SSD0 got 2.51V.
There is 20V on charger and it take up to 1A and...
With genuine 96W charger got Apple logo, progress bar and the moment log in screen should be visible display is blank.
It take 3.3A-4.6A from charger. There is data on TouchBar and it response to touch.
CPU VCC Phase 1-3. How it work? At the start it need Phase 1, then during boot...
Liquid damage on display connector (on lid, not on logic board).
Display cable disconnected and used ext display and there was Apple logo with loading bar but no futher progress.
Did "Revive" in DFU mode and now got battery with charging symbol but it restart every few seconds.
Using genuine 85W...
Board from another shop with previous repair attempt.
L4004 burn out and has been replaced with jumper and PP5V_S0_ALSCAM_F got 0.380V in diode mode.
There is some liquid damage around U7370, U7220.
There was some work with U7220, U7210/20.
Diode mode on big coils is 0.002V-0.004V.
With battery connected got 20V 0.04A but after a few seconds drop to 5V 0A (every a few seconds short jump from 0A to 0.024A.
When I connect trackpad and tap on trackpad it switch from 5V to 20V but then the same issue.
Liquid damage on U9000, J3300_CWR
Tested with board only.
No shorts on big coils.
When charger switch from 5V to 20V so first couple of seconds it takes 0.26A-0.31A and then drop to 0.041A and stays at 0.041A.
PPBUS_G3H - 12.60V
PP3V3_G3H - 3.38V
PP5V_S5 - 5.15V
PP3V3_S5 - 0V - 0.335V in...
Small liquid damage on J5250 and R6323.
There is no backlight (there is data on LCD).
PPVOUT_S0_LCDBKLT = 0V (1.1V in diode mode)
PP5VR3V3_SW_LCD = 5V
Connected known good display assembly and same issue.
Ext display works and internal display is detected in macOS.
Replaced J5250, C5250...
Same issue on both USB port on source Mac. On target Mac it is detected only on one port which is nearer to trackpad (thats as it should)
PP3V3_G3H_SSD0 = 3.3V
SSD_PMU_RESET_L = 1.8V
PPVCCQ_ANI_SSD0 = 1.8V
PP0V9_SSD0 = 0.9V
SSD0_VR_P2V5_EN = 1.8V
PP2V5_NAND_SSD0 = 2.5V...