What is the make/model of the TV? Generally there is an analog output on the TV. If not there probably is on the cable or satellite set top box. That is how my HDTV is connected to my system. I have a Yamaha receiver that just keeps chugging along, and I hate to replace it while it it still works great.
I think there are HDMI to analogue adapters available (check Newegg or Amazon).