Cable not working through home theater receiver
I've been using the same setup for 3 years running my cable through a Denon receiver to the projector and sound system. Cable quit working about 2 weeks ago, all the other inputs work fine still (PS4, 4k BR player and Firestick). Only thing not working is the cable. Replaced the cable box thinking that was the problem. Still had issues, so I bought a new Yamaha Receiver thinking that must be it. Problem still happening. 1st service guy came out, said problem was at main box in neighborhood, that didn't fix anything. 2nd guy came out today and said it was receiver problem as he could connect directly to the projector and get the picture to work just fine. I have tried 3 working receivers and still no picture, I have a hard time thinking that could be the issue since I know they all work fine. Frustrated and confused where to go next??