This may or may not have anything to do with this problem,
but, if you've run out of ideas, you might want to try this
before sending your unit in.
You may have a corrupt waypoint that is freezing up
your machine. Maybe it's sharing memory on one of the
views that the main system needs, who knows.
I would back up my waypoints on sd card(s) and on the
computer first. Make sure you have a good backup.
Then erase them all off the unit.
On the newest update for the 1197, it has an option to
format the NAV directories. I'd do that too.
Then, reboot, and retry the view button.
If the problem is gone, then bring your waypoints into
Humminbird PC to validate them.
Also delete any duplicate waypoints, or any waypoints that
look funny/weird.
Then re-upload/re-install your Waypoints to the unit and try again.