Voom Auto Power off error

[des7832]

I've used my Voom for 2 years to get about 8 local HD channels. Everything worked great (except for some erractic reception on some channels) for 2 years until about a month ago. When scrolling down to my last channel 11.1 CBS the Voom suddendly powered off. This problem has continued since then. I cannot access channel 11.1 or the Voom will power off. I can access all other channels including 11.2 with no problem. I have tried re-scanning all my channels, of course it finds all 8 of them just like before, but still powers off when I go to 11.1. I've searching through every setup menu on the Voom that I can think of and nothing solves the problem. Does anyone have any ideas how to fix this?