Ok. so getting hum when the TV is on. when i unplug the coax cable from my EP350 the hum goes away. or when i unplug my component connection from DVD player to tvthe hum goes away.
So 1st question. where's the ground screw on the EP350? unfortunately the manual online shows EP175 specs and i don't want to remove the wrong screw!
i should also mention. i have no cable, so ground loop not coming from cable outlet.

What does this button do?