Since I was traveling, I disconnected the external drive so that recording are not missed. But when I got back, the 3400 will not allow a swap of tuners. It uses both tuners to record, but will not swap. Anyone else having this problem?
I have pulled the plug which of course fixed the problem. Note, the external drive was not connected so that was not the source of the problem. Note also that the remote's swap button worked on my other 3400.