I'm having a problem DCT-700 digital box. I'm unable to change the channel, bring up the menu etc. Unplugging the box for a little while seems to fix the problem temporarily, but it just stops working again after an hour or so. I've tried changing channels with the TV off but have had no luck so it doesn't seem to be an problem with interference from the TV. The remote's batteries are fresh and I have no problem changing the volume on my TV with the remote (URC 2020B0-B1).
This question has been asked multiple times before on the forum so it seems to be a known issue, but all the listed suggestions haven't helped at all.