Suddenly facing an error on your HP LaserJet and don’t know what it means? The HP LaserJet printer error code B0605 occurs when the printer firmware has crashed. You might see other error codes like B0601/ B0602/ B0603/ B0604/ B0605, however, it all means the same. To fix the error, we suggest you update the printer drivers on your device or install the latest drivers from the HP website. After updating the drivers, check if the printer error is resolved or not. If not then try reinstalling the printer paper tray and toner. This should most probably do the work for you however if the issue persists, you would need to re-flash the printer firmware. Before attempting to re-flash the printer firmware, make sure you are aware of what you are doing, or else you would mess it up even more. Get help from HP Printer experts if you can’t fix the error on your own.