ok just to try and clear a few points
when you do a forced update ( as i have done with sammy 2100 + pace 1000 )
make sure the card is out when you do the update wait till you get your smart card is removed on screen
then replace the card and the card and box will need to pair again as with box and card pairing first time this may take 5 - 30 mins ( mine were done in 10 )
if you update with the card in you get blank screen as if you have used the wrong flash if so reboot box ( with card out ) and then when full rebooted ( with you are not subbed message or the card is removed ) replace card and allow box and card to pair then check subbed channels and all should be working fine
This happened with my sammy too, what i noticed was that although the tit2 went off my opus was still working so as my tit2 had no tiers on it i just copied my opus image over and wrote that to the tit2 and all's working perfectly again.
No, neither the box or the card can initiate pairing. It can only occur via a hit from the cc's control station and that only occurs for a very limited time when the engineer initially installs your system (he rings up and asks for a hit !)
Firmware updates do not un-pair box/card combinations. The boxkey for a box is stored in the loader which is never part of the update. The card can only be unpaired via an Emm - only the provider can initiate this !