My DISH OTA works fine except that it does not pick up 4 channels that my Panasonic TV easily picks up. What I have noticed is all four are unique in that they have a "9" in the units position; i.e., 19.1, 19.2, 19.3, and 49.1. The other 21 channels are some other units digit.
I am told that DISH adapter #213502 is suppossed to fix the overheating problem.
There is a huge thread about this that I just got done reading. You might want to go take a look.