Lexmark MS81x Service Manual page 121

Action
Step 24
a
Upgrade the firmware if it was not upgraded in a previous step.
Note: Contact your next level of support for the correct firmware
level to use.
b
POR the printer.
c
Send the printer a print job.
Does the error remain?
Step 25
a
Replace the faulty ISP option.
b
POR the printer.
Does the error remain?
Step 26
Are there any more ISP options to install?
Step 27
a
Install the next ISP option.
b
POR the printer.
Does the error remain?
Step 28
Run a job to test the option.
Does the error remain?
Step 29
a
Upgrade the firmware if it was not upgraded in a previous step.
Note: Contact your next level of support for the correct firmware
level to use.
b
POR the printer.
c
Send the printer a print job.
Does the error remain?
Step 30
a
Replace the faulty ISP option.
b
POR the printer.
Does the error remain?
Yes
Go to step 25.
Go to step 31.
Go to step 27.
Go to step 29.
Go to step 29.
Go to step 30.
Go to step 31.
Diagnostic information
121
4063
No
The problem is solved.
Go to step 26.
The problem is solved.
Go to step 28.
Go to step 26.
Go to step 26.
Go to step 26.