Are there any plugins which alert on screen or by eMail when & if a card you have stops working?
Intermittently one or both of my cards will stop and a gui restart is required to refresh and bring them back up!
Its all the more difficult as you can see the cards listed fine under cccam servers so I usually only notice when I see clients get 'nok' on channels I should have!
Obviously monitoring your cccam output hourly isn't the best option!!