Action Yes No
Step 18
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 Reset the printer.
c Send the printer a print job.
Does the error remain?
Go to step 19. The problem is solved.
Step 19
a Replace the modem.
b Reset the printer.
Does the error remain?
Go to step 31. The problem is solved.
Step 20
Run a fax job.
Does the error remain?
Go to step 31. Go to step 21.
Step 21
Is there an ISP option installed?
Go to step 22. The problem is solved.
Step 22
a Reinstall the first ISP option.
b Reset the printer.
Does the error remain?
Go to step 24. Go to step 23.
Step 23
Run a job to test the option.
Does the error remain?
Go to step 24. Go to step 26.
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 Reset the printer.
c Send the printer a print job.
Does the error remain?
Go to step 25. The problem is solved.
Step 25
a Replace the faulty ISP option.
b Reset the printer.
Does the error remain?
Go to step 31. Go to step 26.
7421
Diagnostic information
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