This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Most likely, your battery-- also called the "BatRAM battery" needs to be
replaced. When the GS is OFF, the battery supplies power to the clock and its
attached 256-byte RAM. This small RAM is where Control Panel settings are
'remembered'.
If, upon power-up, the GS believes the Control Panel settings have been
messed up due to a low battery, it will reset the settings to their default
(check-marked) positions.
By: Rubywand
 
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