Canon LBP-810 User Manual page 128

If you have a problem with your printer and you cannot resolve it by
referring to the information in this chapter, contact a Canon authorized
service representative.
Before contacting Canon, make sure you have the following information:
❏ Product name (LBP-810)
❏ Serial number (located on the label on the bottom of the printer)
❏ Place of purchase
❏ Nature of the problem
❏ Steps you took to resolve the problem and their results
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Troubleshooting Chapter 4