Rob,

I had tried tuning to a channel with the number buttons so I didn't notice that only the even-numbered buttons work. I attempted the test you described and the 'channel up' button does not work under any circumstances.

Something interesting though, normally the red LED stays lit whenever a button is held. During the test, while holding the up button, the LED was lit only when my hand was blocking the IR signal. Once I moved my hand, the LED went out. When I tried the same thing using the 'channel down' button, one that always works, the LED syated lit no matter where my hand was.

Thanks for the quick responses.