yes I have looked at the manual many times even though I am very familiar with this receiver, having it for so long. I cannot run the test tones through the on-screen display either.

I forgot to mention something else regarding the humming noise. It gets louder when the microwave is being run. Even if I switch everything to my separate 20 amp circuit I still get a hum.

The only reasonable argument for owning a gun is to protect yourself from the police.