PowerBook 165c Screen diagnosis

[Campus90SE]

Hi, I just recapped a 165c and still have issues with the screen.
It looks washed out, without contrast. From near view it seems that there are white stripes in the pixels and I see violet and green borders beneath the black lines of menus and windows.
Is this the vingear syndrome or something else?
If I push the left slider to the left, more colors are visible but the screen is very dark then.
On the display glass I can not see any signs of delamination of the foils on front or back of the glass.

Any advice on what I can do to improve the quality?

 

[joevt]

Set color depth to Black&White mode to check for VRAM or video problems on the output side (to see pixel data path problems).
Take a screenshot and view on a different computer to check that VRAM can be read from and written to correctly.

 

[Campus90SE]

Set color depth to Black&White mode to check for VRAM or video problems on the output side (to see pixel data path problems).
Take a screenshot and view on a different computer to check that VRAM can be read from and written to correctly.

In Black&White the green and violett seams at black lines stay visible. But Screenshots look ok.

 

[joevt]

In Black&White the green and violett seams at black lines stay visible. But Screenshots look ok.

So there's nothing wrong with VRAM from the CPU and graphics controller views.
Seems like an issue with the LCD. Voltage issues?
Should try some test patterns.
FFFFFF White.
000000 Black.
FF0000 Red.
00FF00 Green.
0000FF Blue.
FF00FF Magenta.
00FFFF Cyan.
FFFF00 Yellow.