Canon imageCLASS LBP121dn - Page 344

#766
The certicate has e
xpired.
Renew the certicate, or use a certicate that is not expired.
Managing and Verifying a Key and Certicate(P
. 157)
Are the current date and time on the machine correct?
Check the date and time setitngs. If the settings are not correct, set the time zone, and then set the current
date and time.
Setting the Date and Time(P. 177)
#852
The power of the machine turned OFF for some reason.
Make sure the power plug is rmly inserted into an outlet.
#853
Printing failed for some reason.
If the operation was canceled when print data was being sent from a computer to the machine, try printing again.
Otherwise, check the following:
Are You Printing a Large Job?
The data volume may have exceeded the processing capacity of the machine. Reduce the number of pages to
print, or print when there is no print data being printed or waiting to be printed.
Is the Data to Be Printed Corrupted?
If the data is corrupted or otherwise damaged, x the data.
#861
Y
ou are using an unsupported printer driver, or the data you are trying to print is corrupted.
Use the printer driver of the machine, and try printing again.
Printing from a Computer(P. 115)
Is the Data to Be Printed Corrupted?
If the data is corrupted or otherwise damaged, x the data.
#863
An err
or occurred, preventing printing.
Restart the Machine, and Then Print the Data Again.
Restarting the Machine(P. 75)
Troubleshooting
337