O/k what do the upstream power levels look like ?
The upstream is a bit on the high side but is o/k if it is not intermittently fluctuating higher out of spec.
Is there a router / WiFi in the mix ? If so, for a test, does a computer hardwired directly to the MB7621 (no router in the loop) have the same problem ?
Same issues regardless of going though the router. I tried going through the activation again and just get an Sorry message and told to call.