There are many error codes that annoy the HP Printer users. The particular Error Code B0605
arises when the firmware crashes leading to printing problems. You can try the given methods to fix this error.
• Perform HP Printer troubleshooting method
• Try to re-flash the firmware in boot mode
• Reboot the printer to ensure the error is removed
If the error persists after the fixture then get in touch with HP Printer Customer Service
to consult with the technical executives.Read More: - HP Printer Technical Support