You have bad caps.
Welcome to the club, we've been waiting for you.
A TGrant $300 fix is in your future, unless you know how to dismantle it, and test all the caps on all the boards.
(From what I was reading, deter isn't fixing them anymore. He fixed my last comets issue, for a few bucks less that TGrant, though the luma is now a shade darker afterwards. I don't think he tested the output color values like Tom does. TBC-3000 when using it anyway.)
It's not the heads.
It's not static charge.
I have yet to hear an explanation of how/why that specific issue happens. Because it does look like head damage. Yet it is not.