820-00239 - No image internal display, works and external showing up.

[iremont]

Where to start, tryed to change driver but nothing

 

[2informaticos]

Any fault history available?
Did you try known good LCD display assembly?

 

[iremont]

tryed working display, no image. but external working

 

[2informaticos]

Give us some voltage and signals checked on LCD connector.

There should be some fault history...

 

[iremont]

Customer changed display, battery connected

 

[2informaticos]

Very likely CPU's eDP output has been damaged.
There is no series capacitors placed between LCD connector and CPU, on data lines.

 

[iremont]

u think board trash ?