Lexmark 3350 - X Color Inkjet Service Manual page 25

Code Name
121A Loop Timeout
Error
121B NVRAM
Control
Section
Corrupted
121C Image Pipe
Error
Description
Error detected that a
while loop or similar
loop timed out before
the event it was waiting
on finished.
Indicates that the
Control Section of
NVRAM is corrupted
Indicates an error in
the image pipeline
Action
Unplug the All-In-One;
wait a few seconds,
then plug the
All-In-One back in and
turn the power on. If
the error remains,
replace the system
board.
Unplug the All-In-One;
wait a few seconds,
then plug the
All-In-One back in and
turn the power on. If
the error remains,
clean the NVRAM by
pressing the Black
Copy button and
Power button
simultaneously until
the Mfg Menu
Enabled message
appears. Select Clean
NVRAM. If the error
continues, replace the
system board.
Unplug the All-In-One;
wait a few seconds,
then plug the
All-In-One back in and
turn the power on. If
the error remains,
replace the system
board.
Diagnostic information
4479-XXX
2-7