My VIP 211k lost authorization after not being used for a while. I tried hooking up to broadband and connecting to dishcomm, few minutes after powering off, the receiver regained authorization (not all channels on my subscription but a good amount and also the RSNs). I tested this from my vacation home north of MX. Unable to get PPV tough, something about the show no longer being available. I would recommend trying it if no other receivers are in use at the same time.
And as usual, if everything's working, then don't fix it.