Have a complaint from a customer that the warm up status bar on a Fuji Xerox AP-IV C 3370 is not progressing, it stopped at 2/6. My technician came back to the workshop and take a ESS controller and replace it then it is functionable. Check the record, found that the same problem happens 2 months ago where we replaced the ESS controller also. What could lead to this? Machine is working fine before the problem happen, nothing unusual.
Some quide to this would be appreciated.
Thank you.