thought I would try to get any updates available as i have notice this type issue has been going on since at least 2009 and that is the receivers rebooting themselves several times a day, a total loss of power then new signal search and back on,, i have 2 receivers(vip722/722k) doing this that were swapped out earlier this year,it sounds like there are 100's of these units out there doing this and yes I have done the add the fan thing to aide cooling and plugged directly into the wall socket...
dish 722 receiver reboot
dish 722 receiver reboot