820-2915 Graphic issue

macfix

Member
Hello Every body

I m working on graphic issue like pictured (I dont know how can i describe it:) , i know it not cause from GPU because ASD pass and not freezing or like that.

Tested know good complete LCD and cable with cover
Replaced LVDS connector
Replaced GPUMUX (U9600)
Preheat GPU
But nothing changed

where can check next step..
 

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