I hope my advice helps diagnose the problem.
And I hope others chime in.
Sorry about the recent batch of Puckish humor.
I deal with tech problems all the time.
I'm just a little worn. I just had somebody nuke an amp. With a sweaty unwaxed paper cup. I not getting any audio and my cup has a hole it.
The truth about dog pee is true. A good early indicator that your you dog is diabetic is a line of ants visiting their slightly syrupy pee. Some other signs are
here!
I'm looking for some more links on LCD and backlight yellowing. I havent experienced yellowing LCDs, and I work with a few dozen. I have experienced color skewing and pixel failures, but not yellowing.
I should also spell check.