I have Charter cable and about once every 3 or 4 weeks my Tuning adapter just quits tuning or adapting. The most common message I get while the TA is offline is "channel not available" or Tuning Adapter not connected. I have 2 TiVo Premieres connected to my TV and both TA's seem to quit at the same time. The only way to get them to working again is to unplug (power off) for about 10 seconds, re plug and wait for the green light on the TA to quit flashing, then they work OK for 3 or 4 weeks again. Any solution? Any help much appreciated.