Checks / troubleshooting:
Check the connection between the printer and
computer.

Recommended actions:
After checking, reinstall the firmware.
Retransfer the firmware.
After solving the problem, retransfer the
firmware.
1. Retransfer the firmware.
2. If this does not solve the problem, check if
the transferred firmware was the correct file.
After checking, retransfer the data.
After checking, reinstall the firmware.