I could use a little advice.
The error screen that come up after the 622 can not fine any signal says "Signal Code: 31-11-45"
It also lists the serial number of my DVR and also lists a long number for a smart card (which I do no use).
That may be your problem. I too have a 622 and E* sent me a smart card years ago to put in the smart card slot. The "built-in" smart cards on the 622 are all invalid - they had to replace them with a newer generation card. That is why there is a slot. If this 622 was subscribed at the time of the card upgrade they have sent you a card.
BTW: Having a card in the slot is good to force a reboot - I pull and reinsert it (on rare occasions) when the 622 locks up.