820-01521 keyboard illuminator not working

[yair37]

i was do everything..change all(LCD cable,wipe and restore,put in a good know body) this is someting with the board..
J8500 compare to a good board:
MIPI_FTCAM_CLK_CONN 480- (gboard)720
DP_INT_HPD 480-720
I2C_ALS/SDA 510-610 1.8v on both

PP5V_MAIN_ALSCAM 5v

 

[2informaticos]

ALS doesn't work?

 

[yair37]

no

 

[2informaticos]

Check all components ALS related on the MLB.

 

[yair37]

all look fine

 

[2informaticos]

R8556/8 have correct ohm value?

 

[yair37]

yes 33hom

 

[2informaticos]

So machine works good, only missing KB backlight and ALS?

 

[yair37]

yes.. very wierd..when i put good board all working but with this one..no..

 

[2informaticos]

Any error pops up running diagnostic mode?

 

[yair37]

no nothing

 

[2informaticos]

Compare voltage and diode mode readings on ALS and KB backlight circuits (between both boards).

 

[yair37]

the same....too wierd....