Two receivers won't send sound to front left and front right speakers.

I'm at my wits end. I recently purchased a Denon s720w receiver to complement my Samsung mu8000 and xbox one x and ps4 pro. Everything seemed fine for a couple of days. Now, my front left and front right speakers (Polk tsi500) won't output any sound. Won't even sound the test tone. When I hook the wires up to a different channel like center, the sound plays out of these speakers leading me to believe it is not broken speakers. I thought it was the receiver so I plugged everything into my old Yamaha RXV663 and i'm getting the exact same issue. What the hell could I be missing here? The speakers used to play noise, now they don't seem to be. Anyone have any hints as to what I might be missing here?

For more info, I have a polk CSI a4 center channel, two polk TS5 bookshelfs for right and left surround, and polk OWM3 surround back left and right.

Submitted by xpluralx | #Specialdealer Special Offer Online Shopping Store 2016