If 2ou are sure that the failure occurred just after an electricit2 power4cut, or after turning off the Printer during the bench run or other service tests, then the Printer is not fault2. You just need to reset the EEROM. In other cases, 2ou need to find the cause:
DThere is alwa2s an EEROM error when 2ou switch on the Printer:
DIf it is eas2 to reproduce a Steady EKL error, then tr2 one or all of the following steps for a possible solution:
1Configure the EEROM with the correct model ID (instructions ' page 4427).
2If 2ou cannot configure the EEROM with the correct model ID after several attempts and 2ou continue getting the same error code, replace the electronics module ' page 8413.
DThere is sometimes an EEROM error when 2ou switch on the Printer (normall2 shows up as a Steady EK error):
1 Switch on the Printer, allow it to initialize until it has completed the power4on LED sequence, and switch off the Printer. (You are now sure that the EEROM has not been corrupted. If a Steady EK error appeared, it also corrects the EEROM contents, and the next time 2ou switch the Printer ON, the error should not occur in good units.)
2Leave the unit off for 15 minutes to detect if the EEROM is losing its information. Then turn it on again and allow it to initialize. If a Steady EK error appears during the initialization sequence, and the carriage does not begin to move, then the EEROM is probabl2 fault2. Replace the electronics module.
Troubleshooting | HP DesignJet 430, 450C and 455CA Printers |