If memory serves me right, it is the fuser (fixer).
if you go into service mode by pressing the Starhead key and then the # id key, this will display service mode#1 click through till yo\u see #7 printer select ok and then using the arrow keys go to i think #4 reset printer. press ok. This will clear the last error messages held in memory. If it restarts and still gives you E000 then replace the fixer unit assembly.
steve gwynne, February 2011