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I've checked the FPC screen connector J8500 and on pin 36 - I2C_ALS_SCL is shorted 5.3ohm diode mode 0. The normal diode measurement on this pin is 0.463 according to another logic board. This line goes to a 1.1K resistor R5316 pin 1 PP1V8_G3S and pin 2 receives the signal (I2C_ALS_SCL) from T2...

I use to place the black cover that goes on top the battery board between the battery Connector to isolate it. Can the flex cable connected cause any damage?

I think I left the flex cable plugged in. Just disconnected the battery.

The Mac came in for a screen replacement. I've replaced the screen it stops working. Trackpad clicking in a loop. I've replaced screens on a hundreds of Macs and never had this issue. Getting 20V and 0.0230A LogicBoard was stand-alone. All AWAKE and SLP are cycling every 14 sec PP1V2_AWAKE -...

Hi, we have an A1990, i9 & Radeon 560X. Before it was freezing every few seconds, almost as if failing SSD, even on external macOS installation. I have tried a clean reinstall, revive + restore T2 firmware and it now works fine, other than it seems to kernel panic after some time in sleep...

Got this kernel panic screen once.

C7020 – 3.3 ohms C7023 – 2.7 ohms I could not install the system again on internet mode. Every time it goes to globe and after Apple logo it reboots. I enter in Target disk mode and cloned the system from another mac, and it boots to the system again. (Battery and Touchpad disconnected) Only...

I've tried to dfu revive and restore in many ways. With and without battery, touchpad. Nothing works. I've connected everything and done dfu revive and halfway in the process I've disconnected the battery flex cable. It went all the process and back to life. But still same issue. Turns on and...

I've tried to restore and revive and no results. The problem now is that it won't turn on even with batt and touchpad disconnected. T2 firmware is corrupted. Any ideas on this, please?

Hi, everyone. Hope you can give some light on this issue. Got this MacBook with no display. When disconnecting the battery and touchpad it boots to the system, but if either is connected it will not display, or sometimes the Apple logo and kernel panic. I've replaced the touchpad and battery and...

Okay. Thanks for your help. I guess this is a BER now.

U8100 Pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 16, 17, 18, 19, 20 – 0V on all of than. Pin 12 – 5.14V Pin 15 – 4.93V Diode on Pin 2 is not normal if compared with another boards. Not same boards, but I think it should at least be similar. Pin 2 – 0.054

The resistor was measuring correct, but I replaced anyway, and for some reason it made a difference. R8123 Replaced Pin 12 – 5.14V Pin 15 – 4.93V Those are the only pins with voltage.

U8100 Voltage on pins. 6 – 0V 12 – 0V 16 – 0V 17 – 0V resistance to ground 1 - 350 Kohm 5 - 411 Kohm 9 – 107.6 ohm All resistors are fine.

Coming back with quick update and asking for more help, please. All 4 RAM modules replaced. Same capacity, but different brand. I had to move a resistor to change MEMORY CONFIGURATION STRAPS. Originally it had a Micron Memory and I have replaced for a Samsung Memory. R1331 moved to R1330 to fits...

1.3V injected on PP1V1_S3 and only RAM modules are getting slightly hot. All 4 removed and the short on the board is gone. On the modules, the pins are shorted to the ground. I will get new modules, replace them, and return here with an update.

I removed the Current sensor R8118. Diode mode: PP1V1_S3 - 0 (2.2Ohms to ground) PP1V1_S3_REG_R - 0.448 ISNS_CPUDDR_P - 0.706 ISNS_CPUDDR_N - 0.706

Is this normal? PP1V1_S3_REG_R - 0 Diode mode Res. to ground 2.6 Ohms

This is what happens when trying to revive. The System cannot be restored on this device. The operation couldn't be completed. (AMRestoreErrorDomain error 6 - Failed to handle message type StatusMsg (Operation failed)) [AMRestoreErrorDomain - Ox6 (6)]

For some reason with the firmware that you gave me, it gets stuck on 5V. I've reprogrammed it with the original firmware and it is back to 20V.