It's an interesting suggestion. My PB160 has a fairly poor greyscale display (which improves dramatically when set to display Black & White only), and I had a 145b that I had to junk because the display was so bad. The logic boards look pristine.

It would be relatively easy to take the lcd apart and have a peek - even washing might do the trick, or else minimally help with diagnostics.

Mind you, I recently got a PB180 on here with no display problems at all, and that seems to have cured my PB1xx series wanderlusts for the present. The PB160 and its screen will have to wait.