How do I reset my HP color laser printer?

To restore the product to the factory-default settings, follow these steps.

  1. Turn the product off. Disconnect the power cable from the product for 30 seconds and then reconnect.
  2. Turn the product on while you press and hold the Resume button for 10-20 seconds. The Attention light turns on.
  3. Release the Resume button.

How do you cold reset an HP m4555?

LJ m4555 MFP : not accept factory settings restore

  1. Turn the product off and then on.
  2. When the memory count appears on the control-panel display, press and hold 6 until all three. LEDs flash once and then stay on.
  3. Press 3 two times until the Cold Reset item appears on the control-panel display.
  4. Press 6 one time.

How do I reset my HP printer memory?

HP LaserJet 4100 and 4101 MFP Series

  1. Press “Power” to turn off the printer.
  2. Press and hold “Select.”
  3. Turn the printer back on while continuing to press “Select.”
  4. Release “Select” when all three lights on the printer are illuminated.
  5. Press and release “Select.” The memory will be reset and then the printer will restart.

How do I reset my HP Laserjet 4345 MFP?

HP 4345 M4345 Laser Printer Cold Reset

  1. Turn the MFP off and then power back on.
  2. When the memory count appears on the printer control panel display, Select and hold 6 until all three LEDs flash once and then stay on.
  3. Select 3 four times until COLD RESET appears on the printer’s control-panel.
  4. Select 6 once.

How do I update the firmware on my HP Laserjet m4555 MFP?

Touch the Device Maintenance button. Touch the USB Firmware Upgrade menu. Insert the portable USB storage device with the firmware upgrade file on it into the USB port on the front of the product, and then touch the OK button. Touch the firmware update file, and then touch the Upgrade button.