Before replacing the drum on this 3100cn, I blew out the stray toner with compressed air. When the printer is turned on, its display says "Diagnosing", then "Please Wait", then "004-332 Restart Printer", then "Contact Support IfMessageReturns". The printer will give the same messages each time I cycle power. I have read many posts related to this subject. I do not see any broken or bent parts inside the printer. I have removed and reseated each toner and the drum. I continue to receive the previously mentioned messages. Any help would be appreciated.
Thanks for the link. I tried all the suggestions but nothing resolved the problem. I continue to get 004-332 Restart Printer. The last option pointed to contacting tech support. It is out of warranty so I will probably recycle it.