On Thu, 17 Aug 2006 22:23:54 GMT, "Phil"
wrote:

There does not seem to be a visible user reset button on the unit.

Taking out the battery resets it.

If you can open it up, see if you can unplug the display - either pull
the display out of the socket or pull the connector off the display
(very carefully). Blow the connector out and wipe the card edge of
the display with a lint-free cloth (linen or a clean t-shirt).

Sitting a drawer for years can make the connection between the display
and the connector oxidize, so some of the signals aren't getting
through. Then, again, the display could just have gone bad. But
cleaning the connection won't cost anything.