Macbook Pro M3 A2992 820-02918-A No Backligtht

[isa1985]

I have here, Macbook Pro, this think has no Backligth.
Already changed screen and Backligth IC "209100B1"
Have some one Schematic and Boardview?
can some one give me some tips, whats wrong with gis device.

 

[2informaticos]

See if 820-02098 backlight area is similar.
Check all 0 ohm resistors around the chip.

 

[isa1985]

RP830,31,32,33
RP880,81
RP873 All 0 ohm resistor its ok.
my be need again change UP800 ?

 

[2informaticos]

Check the value of other resistors which you've noted to be affected by corrosion.
Once the chip is removed, also check continuity for all its pads to corresponding components.
Replace all capacitors affetced by corrosion too.

 

[isa1985]

Thank you some much, the ways from CP8177 and CP818 to Backligth IC 209100B1 was damaged