Okay, so I decided to just do only my own zip code for my AM21 since I can just watch the others on my TiVo. But when I type my zip code (55901 if you must know), channels from some other zip code always overwrites it. So I did a CLEARMYBOX on my main receiver (only time I've done that on this receiver), and everything is erased but I can't access any of the 4K content. I just did that just now. Does the 4K access return after a little while, or do I need to do something else?