Another Weird KLN94 Problem

I had a bizarre problem on my KLN94. The display itself is totally
fine (i.e. the moving map shows everything correctly, all pixels are
OK); however, on almost all other text pages, there is information
missing. For example, the groundspeed is not showing on the NAV page,
or a frequency on an APT page. One APT page showed no airport
information at all. On some pages, a whole text line is missing, on
another just a few numbers (the letters are fine) or visa versa.
It continued to work fine to input the autopilot. This has happened
twice in the last two years and by shutting the unit off and on the
problem went away. Ever heard of anything like that?

Gerd