820-00165 - there might be an issue with the camera

[Alan.L]

the board was liquid damage on U5620 and U5800,

an appeal, replaced these components and now the board boots fine. no high fan and no slowdown.

the camera is working fine on photobooth. however, ALS is not working.
The apple dialogistic confirmed "there might be an issue with the camera"

the camera connector looks great under a microscope. also tested with another known working display assembly.



diode mode reading on J4002
--------------------------------------------------------------------
mipi_clk_conn_n pin2 0.397
mipi_clk_conn_p pin3 0.397
mipi_data_conn_n pin5 0.401
mipi_data_conn_p pin6 0.399
smcbus_smc1_s0_sda pin8 0.737 (0.507 on known working board)
smcbus_smc1_s0_scl pin9 0.739 (0.509 on known working board)
i2c_cam_sda pin10 0.725
i2c_cam_sda pin11 0.726
PP5V pin12 0.434 (5v is present)

---------------------------------------------------------------------

this is an SMC problem right,??
cant be u3900 since the camera is working. does SMBus talk to u3900??

 

[Alan.L]

mmm, think i've found the problem.

I've removed U5620, pin9 and pin10 has no continuity to u5800

 

[Alan.L]

fixed

u5800
--------------------------------------------------

to scl and sda test points
-----------------------------------------------

 

[Inwerp]

what glue did you use? still looking for something which fixes fast enough but does not glue my fingers together like cyanoacrylate

 

[Alan.L]

thick uv glue, known as fishing glue. i used that stuff to make my own smc edge bonding. I'll try to get a photo tomorrow.
the texture is very similar as original edge bonding for the SMC and CPU. takes a couple of seconds to cure with a uv light.

https://www.aliexpress.com/item/3277...27424c4dgJRPBT