820-3330B A1286 No İmage

[2informaticos]

Do you get 3.3V at pins 2/3 now?
If not, check L9000.

Missing image, or just backlight?
Check L9010/11 continuity.

 

[tipoti]

(u9000)
pin1,4,5 = No voltage
pin2,3 = 3.3 voltage

I checked with light there is no logo no screen

 

[2informaticos]

Do you still have external image?
Can you login to macOS?

 

[tipoti]

yes, there is an image on the external screen, I said before

 

[2informaticos]

Check if internal screen is detected in system report.

 

[tipoti]

no screen only video card
intel hd 4000
nvıdıa gt650m

 

[2informaticos]

Check traces from U9270 to J9000.
Post U9270 voltages, with internal LCD connected.

 

[tipoti]

Check traces from U9270 to J9000. = I checked the line it's ok

U9270
pin1 = 3.3 Volt
pin2&3 = 3.3 Volt
pin4 = 3.3 Volt
pin5&12 = No Voltage
pin6&13 = 3.3 Volt
pin7 = gnd
pin8 = 3.3 volt
pin9&10 = 3.3 volt
pin 11 = 3.3 volt
pin14 = 3.3 Volt

 

[2informaticos]

Looks like discrete graphics is selected.
You may have a problem with GMUX (U9600), or bad communication with internal LCD.

 

[tipoti]

i changed u9600 but same

 

[2informaticos]

You may have problems with LCD connector, or its traces.
Did you tested with compatible good LCD assembly for sure?