# When a Problem Cannot Be Solved

If you cannot solve a problem by referring to the information in this chapter, contact your local authorized Canon dealer or the Canon help line.

##### Do not disassemble or repair the machine yourself If you disassemble or repair the machine yourself, it may not be covered by warranty.

### When Contacting Canon

When contacting us, have the following information ready:
Product name (LBP712Cx/LBP710Cx)
Dealer where you purchased the machine
Details about your problem (such as what you did, what happened as a result, and displayed messages)
Serial number (10 alphanumeric characters long, found on the label on the back side of the machine)

##### Checking the serial number from the operation panel You can also check by () <Serial Number>.

101K-06L