Bryant Frazer expounded thusly:

: Am I missing something? I have monkeyed around in the service menu to
: reduce overscan, and was playing with a few of the geometry functions even
: more recently. I don't think I changed anything that I wasn't 99 percent
: sure about, but it's just possible that I accidentally changed a setting
: in the system ID section, which is just below the geometry section of the
: service menu.

Answering my own question in case someone else has a similar problem. A
detailed Google search eventually revealed a Web page
(http://www.agoraquest.com/viewtopic....=1793&forum=34) with a
forum posting by someone having the same problem. My ID1 and ID5 settings
were both off, and changing them solved the problem.

-bf-