HP LaserJet M1005 MFP - Restoring factory default settings

Restoring the factory-set defaults returns all of the settings to the factory defaults.

CAUTION:

This procedure deletes any pages that are stored in the memory. The procedure then automatically restarts the device.

1. On the device control panel, press Menu/Enter.
2. Use the < or the > button to select Service, and then press Menu/Enter.
3. Use the < or the > button to select Restore defaults, and then press Menu/Enter.
   The device automatically restarts.

https://support.hp.com/