Hey Mutts, it sounds almost like an unshielded magnetic issue. But you say it only happens when you have the menu screen up from the 990? And the sub's 10 feet away so probably not. Though maybe it's one of your speakers? Weird. Is it on every beat of the sub? And it doesn't happen at all when you are watching a movie or thumping bass music while the tv is on? I have Axioms all around too ....bluejeans on everything. I run the monitor out to video 5 on my tv, but I have a plasma. I've never had a problem. I find it hard to believe that just hooking up the 990's monitor out to anything could permenantly damage a tv. It's just a component signal like any other. You tv either accepts and uses that signal or not.

Very strange. Let us know if you resolve it, I'm curious.