Started having a peculiar problem with (I think) my 1604. It's being fed HDMI from a TiVo Mini which is set up to use Dolby Digital.
About a week or two ago, the 1604 started decoding some channels and some recorded shows as (what I assume is) DD 2.0 (really DD 3.0 because the center channel is also active). The little DD symbol on the front panel lights up, and the front panel says "Stereo", even though I know for certain the channels and shows both have full DD 5.1. The 1604 is, in fact, only sending stereo to the speakers - the surrounds are silent, and the Info display from the 1604 shows them as not being active.
I reset the 1604 CPU as recommended here (turn off and unplug for 10 minutes), but that changed nothing.
I don't know for certain if the issue is the 1604 or the TiVo Mini. The Mini streams from a TiVo Roamio Pro which is feeding a Yamaha AVR, and everything is normal at that end.
I posted on tivocommunity.com, and either no one saw the post or no one else is having the issue, because I got a single generic response there.
Anyone have ideas as to what the heck is going on?