Peculiar HD OTA Problem

I live in the Hartford, CT area and get my HD channels OTA. I usually have no issues with receiption. Lately though, I am having a problem getting channel 61-1 (Fox HD). I get it fine on my HD DVR, but will not come in at all on my 2 H-20 boxes, even though it used to. The H-20 boxes also remove 61-1 from my channel line up, even if I put it back. It can't be the antenna because it works fine on my HD DVR. I get the other HD locals on my H-20 boxes.

Any suggestions? I have tried resetting the boxes with the reset button.

OK, now it works. Must have been an issue with the channel.

I do have another question for those in the Hartford, CT area - I cannot seem to get a HD PBS channel. The guide shows 53-1, but it never comes in. Is that the HD channel for PBS 24?

Thanks in advance.