Apple MacBook Pro / Model A2141 / 820-01700-A Board / 20v .08a-.80a /

[zeydullak]

Hello,

We have an Apple MacBook Pro model A2141 and Board number 820-01700-A that does not boot up, does not chime, fans do not spin. It Uses 20v and starts at .08a and goes up to .60a~.80a and drops to .0a before going back up.

What should we take a look at first?

Regards,
Zeydulla.

 

[2informaticos]

Be sure to use 96/140W charger.
Also test with charged battery.

 

[zeydullak]

We connected a 140w charger and placed the board in a completely working MacBook, it goes up 0.90a and restarts. customer did not mention anything about water damage.

What could be causing this issue?

 

[2informaticos]

Do you get voltage on any coil before restarts?

Also check U7800 LDOs, G3S and SSD voltages.

 

[zeydullak]

We have a working board and when testing it with USB tester the amps start at .06 but go up to .35~.40, The clients board stays at .06 and does not go up.

L7822 -> -0.027
L7821 -> -0.027
L7813 -> 1.80280
L7817 -> .90204
L7816 ->.90784
L7814 -> 1.10418
L7815 -> 1.10330
---------------------
PPBUS_G3H -> 12.6
---------------------
PP1V8_SSD -> 1.8
PP0V9_SSD1 -> .89993
PP2V5_NAND_SSD1 -> 2.5295

 

[2informaticos]

Is the machine recognized in DFU?