MAXDATA Vision 350M Handbuch Seite 63

The characters on the screen repeat while I type.
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CMOS Problem
A message "CMOS Checksum Failure" displays during the
booting process -
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You may be holding the keys down for long while you're
typing.
Keep the keyboard clean. Dust and dirt under the keys
could cause them to stick.
Configure the keyboard to wait longer before the auto repeat
feature starts. To adjust this feature, Go to [Start > Settings
> Control Panel], and double-click on the Keyboard icon. A
dialogue box shows up with the adjustable settings for the
keyboard.
If the message "CMOS Checksum Failure" appears during
the booting procedure, it might indicate the shortage or the
run-down condition of the small CMOS (Complementary
Metal-Oxide Semiconductor) battery. If so, you need to
renew the CMOS battery.
In the life cycle test, it illuminates one to one and half years
as lasting operation. Since most users don't operate the
system continually in reality, the Ni-Cd CMOS battery
might run out of power after 3 or 5-year usage. In another
word, the CMOS battery replacement needs to be done
after a long operating period.
For more detail information or technical support,
please constact your local dealer or distributor.
Section 5 TROUBLE SHOOTING
5-9