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.
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Do not disassemble or repair the machine yourself
If you disassemble or repair the machine yourself, it may not be covered by warranty.
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When Contacting Canon
When contacting us, have the following information ready:
Product name (MF419x / MF418x / MF416dw / MF411dw)
Dealer where you purchased the machine
Details about your problem (such as what you did and what happened as a result)
Serial number (eight alphanumeric characters long, found on the label on the back side of the machine)
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Checking the serial number from the operation panel
MF419x / MF418x
Press ![](./images/book_images/pubnumbers/USRMA-0821/b_key_button18.gif) ( ![](./images/book_images/pubnumbers/USRMA-0821/b_key_counter_ic_chg.gif) ), and tap <Check Device Configuration>.
You can also check by ![](./images/book_images/pubnumbers/USRMA-0821/b_key_arrow_right.gif) <Device Status> ![](./images/book_images/pubnumbers/USRMA-0821/b_key_arrow_right.gif) <Serial Number>.
MF416dw / MF411dw
Press ![](./images/book_images/pubnumbers/USRMA-0821/b_key_statusmonitor18.gif) , and tap <Device Status> ![](./images/book_images/pubnumbers/USRMA-0821/b_key_arrow_right.gif) <Serial Number>.
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