I'm moving discussion from another thread
I've had a CM-7000 for a few years but I haven't used it much. Recently I tested it again, thinking I might cancel my cable subscription. The CM seems to work well at first, but it loses a number of stations after it's been on for a while, beginning with KTVU. After about 30 minutes, the picture starts to pixellate and the sound drops out. Eventually, it completely loses the signal.
If I turn the CM off for a while, it will get the station again, but as the signal fluctuates (as displayed via INFO) it trends downward until it hits the 30s and finally loses the signal completely again.
A couple folks on the other thread suggested I swap the CM with a DigitalStream I have connected to another TV & antenna; I did so, and the symptoms followed the box. Then I tried Floydage's suggestion of cutting power while the unit was on, which he says does a hard reset. My channels were still there afterward, and I waited more than 10 seconds before plugging back in, so I'm not sure what was reset, but it didn't help. I also tried a factory reset as described in the manual. This also had no effect.
I've tried the diagnostic screen mentioned in this thread. The unit passed all the tests most of the time, but it did fail the RAM test once.
KTVU isn't the only channel affected. After KTVU goes, a number of the others do, too, but KPIX and KMTP, for example are still going strong long after KTVU has disappeared.
Does this sound like it could be the early symptoms of the capacitor failure that's been discussed on this thread? Whitebar, if you're reading this, are you still offering to do cap replacements?
I'm mainly interested in keeping the CM around to use with my Panasonic Showstopper--it's been a while since I was researching this, but I remember it was one of the better boxes for that purpose. If there's something else these days that's better...or better yet, a modern DVR with built-in digital tuner and no subscription fee, I'm open to suggestions.