A few seconds dicking around and I figure out how to get the setup menu on the box (turn it on, then turn it off using the frontpanel power button and within a couple seconds hit the 'MENU' frontpanel button). The menu comes up as the manual describes, but says it's *not* connected via HDMI.
No matter what I do, I can't get it to sync HDMI. The DVD player, plugged into the same port on the TV, comes right up. Finally, after 30 minutes, I acknowledge Geek Fail and call Comcast. After navigating the phone tree, I get a tech who actually seems clueful. He asks what kind of TV. I tell him. He says 'What model number?' Uh-oh. I give it to him. He tappity-tappitys on the knowledge base, and says, "Yep, sorry, I thought so. There are known issues with using certain models of Sony Bravia flat panels with our cable boxes - the HDMI just won't sync."
So if you have a Sony Bravia and are trying to get a Motorola DCX3400 cable box to work properly with it, forget it.
On the plus side, since the cable box will only output 1080i (or maybe 720p) anyway, you can just use component video+RCA stereo and get the same resolution.
Well, today, I ran the recipe on a new slice and it tanked. apt was exiting with status 100, and when I checked, it was producing the following error:
IP ADDRESS apt-get update returned 100, expected 0
W: Failed to fetch (the problem archive file): Hash Sum mismatch
The problem here, it turns out, is that the archive in question I was attempting to get updated manifests for had been updated - but the checksum (Hash Sum) for that archive had been *cached* by something in between my slice and the archive (likely some form of proxy). As a result, they didn't match, and bam.
The Fix: The fix came from here. Essentially, mod your apt-get command to include an option for 'no-cache', either during the call:
apt-get update -o Acquire::http::No-Cache
...or by putting the option into your apt config (see the post linked above for how-to).
Whew. Another day, another thing.