820-4924 - no image or back-light

nelo1012

New member
have a 820-4924 and had very minor liquid on u 8300 and mostly on C8352 pin 2,

is this a GPU issue, i seen it pin 2 of C8352 goes to the GPU,
 

2informaticos

Administrator
Staff member
There is no dedicated GPU.
Mentioned line goes to CPU.

Do you get chime and USB activity?

Check if you get voltage on L8300; there must be 5V in the first 1-2s, even without LCD connected.
 

2informaticos

Administrator
Staff member
"DP_INT_HPD 0.0v"
PCH cannot detect the LCD in this case.
You must check this signal when 5V is present at L8300.
Try known good LCD assembly; be aware of year compatibility.
 

nelo1012

New member
i checked DP_INT_HPD while a known working display connected and also known year to be compatible.

also yes, i checked L8300 having 5v while testing DP_INT_HPD
 
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