What kind of surge suppressor are you using? You might try one with a bit more filtering. While I dislike suppressors with transformers or chokes, because of their current limiting, in this case it may be the lesser evil.

Try a Tripp Lite ISOBAR-ULTRA. Even if it doesn't fix the problem, you'll have an excellent surge suppressor.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris