820-00840-A Macbook Pro 1708 problem

[filip85]

I have a problem with that board, its show picture, and everything but the screen is flickering and show some previously opened windows. It seems that the screen is very slow., also on the left side and top, there are some lines as well.
When I turn it on in safe mode it works normally only with those lines on the left and top
I think that laptop has some point on the top left corner of the screen like it was dropped, but it's very small.
When I share the screen with other computers on it its normal.
What kind of problem is that, is this screen, GPU or what? How can I investigate that?

Thanks in advance

 

[SMMRepair]

Bad screen from the sounds of it. Try a new one.

 

[filip85]

If I don't have another screen is there a way to find out that it is the screen for sure? Like I said in safe mode it's working normally

 

[JohnB8812]

See how it behaves on an external monitor

 

[filip85]

It's working normally on the external monitor. So it is screen
Are those things repairable or just need to replace with new one?

 

[2informaticos]

Get a complete assembly...

 

[JohnB8812]

First try a new LCD cable those things fail constantly on these new ones. If that doesn?t do it, for sure replace the entire display assembly