ErrorCodeDoctor
HP · Printer (LaserJet)

HP Printer (LaserJet) Er/77 error code

Difficulty: Hard · Cost: $0–$200 · Duration: 2m

The Er/77 error means your HP LaserJet printer detected a secure device failure — a fault in the printer's security hardware or firmware. Turn the printer off wait 30 seconds and turn it back on. If the error persists contact a qualified technician.

Common causes

  • Security hardware or firmware fault detected in the printer

How to fix it

  1. 1

    Turn off the printer

  2. 2

    Wait 30 seconds

  3. 3

    Turn the printer back on and check if the error has cleared

  4. 4

    If Er/77 persists contact a qualified technician

Related HP Printer (LaserJet) error codes

1

Er/01

The input tray is empty — no paper loaded

easy
2

Er/02

The cartridge access door is open

easy
3

Er/03

The printer failed to pick a sheet of paper from the tray

easy
4

Er/04 / Er/05 / Er/06

A paper jam was detected inside the printer

easy