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I have make revive and after restore The 2 are working sorry for my explanation

After dfu restore finish machine start and yes i have sound for select language

In dfu revive Machine start we have sound for select language but Black screen We enter in recovery mode and screen works but not in os

Hello, I have a problem with a MacBook Pro A2779 820-02841-A when it starts up the apple logo is displayed and as soon as the session starts the screen goes black. I've tried a reinstallation, a DFU, unplugged keyboard, trackpad, battery, angle sensor, but nothing changes, no trace of oxidation...

it's ok i have jump all lines and have 0V but not charge, test again with others battery same

hello i have mainboard 820-00850 with 1x CD3215C00Z defect after test with sofix machine i have replace but actually it's 5V and i have 0.020A and 1x pulse to 0.370A and restart 0.020A PPBUS_G3H : 12.3V PP3V3_G3H : 3.3V in diode mode, L9080/81 are low : 0.08V, i have pulse 1sec 0.45 but after...

With battery connect too?

But dont have see broken trace with microscope

Continuity is good between this pins its for that is strange. I test tuesday with jumper beetween this point

"When I should believe you?" Yes because when battery is plugged on pin 5 J5150 i have 3.28V but on pin R5150 i have 0V is strange I have make permanent short on R5150 and same. Not charge too

SYS_DETECT : 3.7V SYS_DETECT_L : 0V i have shortt R5150 and same i have 3.2V on pin 5 J5150 only whith battery connected

oh, SYS_DETECT_L : 3.28V after replace UD201 idea?

SYS_DETECT_L : 3.28V now but not charge

i have test again with 3 battery (2 compatible and 1 original) same

have replace UD201 and now have 3v3 on I2C_SMC_PWR_3V3_SCL i see the percentage now but when plug charger don't charge i have 19V and when start and logged bettween 0.165A and 0.3A

for UD201 : pin 2 : I2C_SMC_PWR_SCL : 0.032 in diode and 0V pin 4 : I2C_SMC_PWR_SDA : 0.335 in diode and 1v22 pin 5 : I2C_SMC_PWR_3V3_SDA : 0.523 in diode and 3V24 pin 6 : I2C_SMC_PWR_3V3_SCL : 0.677 in diode and 0.8V

For UD200 / pin 2 : I2C_SMC_PWR_1V8_SCL : 0.520 in diode and 1V78 pin 3 : I2C_SMC_PWR_1V8_SDA : 0.553 in diode and 1V78 pin 4 : I2C_SMC_PWR_SDA : 0.377 in diode and 1V22 pin 5 : I2C_SMC_PWR_SCL : 0.032 in diode and 0V Abnormal for pin 5 i have replace UD200 and RD200 same

test replace Q5155 and same

SYS_DETECT / 3.74v SYS_DETECT_L / 0V

hello i have 820-02016 mainboard battery is not detect, think info battery have problem no short on pin 1/2/3/4/5 on J5150 when i put new battery compatible or original not charging and 0% but when i remove usb-c cable machine stay lit if i remember i need make jump between 2 pins