Garmin SL60 - Manual (Page 105)

comment is deleted if the calculated checksum does
not match the saved checksum.
User DB Test Failed: Press ENT
If the User DB checksum test fails, both the COM
board and the GPS board continue to function.
Flight Plan Memory Failure
Flight plan checksums exist for all flight plan
information. If a particular flight plan checksum
does not match the calculated checksum, the flight
plan is deleted, or in the case of the Active Flight
Plan, the plan is reinitialized. The following
message is then displayed until you press ENT.
Flight Plan Memory Failed: ENT
If the flight plan memory checksum test fails, both
the COM board and the GPS board continue to
function.
Miscellaneous NVRAM Memory Failure
All other user input values which are held in
non-volatile
RAM are checked for validity,
producing the following message if any of the
values needed to be reset.
Memory Test Failed: Press ENT
If the memory checksum test fails, both the COM
board and the GPS board continue to function.
Database Test
This checksum test compares the stored database
checksum with the calculated database checksum.
Since this test may take several seconds to
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Start Up Displays