We have
a few threads on this very subject.
I have received 3 PW (original and 2 replacements) and all have had discoloring on the screen in the form of bluish green diagonal stripes/blotches or overall bluish green with pinkish beige blotches.
I've come to three opinions. Either all PWs are defective in this way or there is a big batch with quality control problems or a number of us are more color sensitive to this phenomenon.
I'm keeping the least offensive PW.