Error code: 00020003
<- BackBOOT program SUM error.
Explanation:
There may be a case where the boot program of firmware is broken. In such a case, this message is displayed and the printer stops operating. Only at power on.
Cause of trouble:
SUM check error for BOOT program area.
Remedy:
1. Firmware Reinstallation.
2. Replace the MAIN Board (C472 MAIN).