PVM 20-L5 dark spot on screen

[Michael Ikonomidis]

There is a dark spot near lower right corner of screen on my PVM 20L5. It's hard to see in the pic, so I circled in red. Much more noticeable in person.

Normal power on degauss does not fix it, so I ordered a degaussing coil, which I'm hoping will help.

Anyone else see this issue and know how to fix?

Thanks