Error B0601 on the HP Laserjet M1005 MFP firmware caused by firmware crashes. Please follow the steps below.
  1. Connect your computer to the Internet network because later you will download the firmware via the printer.
  2. Make sure you have installed HP Laserjet M1005 driver and connect the printer's USB cable to a PC desktop or laptop.
  3. Press the Cancel and OK buttons on the printer simultaneously.
  4. Turn on the printer.
  5. Run the Firmware Update Utility.
  6. Select HP LaserJet M1005 printer from the dropdown list then click Send Firmware button.
  7. Please verify Downloading Update Data is displayed on printer's control panel.
  8. If downloading has finished then printer would be restarted automatically.
  9. The firmware is now successfully recovered.