How do I restore the factory-set defaults on the M127fn?

The manual identifies restoring factory-set defaults as a troubleshooting step available from the product. This option is listed under Chapter 8 (Solve problems) in the section 'Restore the factory-set defaults.' Refer to page 75 of the manual for the specific steps to complete this process. (Page 75)

From the official HP Laserjet Pro Mfp M127fn manual, page 75

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