We have this same issue. Did you find a solution?
We changed drum and toner.
Fault code says I need to replace black imaging unit but I did this in August. Is there any way of checking to see if the black unit has a fault without replacing the whole set again
Same issue here on a phaser 7100.
all was working fine, untill I replaced the black imaging unit.
after power up, I get te he "power off and on, code 092-321"
tried all the steps as indicated in the on line manual.
I think also you must replace the K drum.
I've had my printer a little over 2 years and its been workign fine. Last week it started to generate an error message.
The code is 092-321 and it says remove black toner, reinsert and restart printer.
I did this,and it didn't work. A couple of tries and it got going again.
It then happened again, so with a bit of google I found some possible issues (including through Xerox support). I checked the waste toner, one possibility,and found it was pretty full so got a replacement.
Everything started working again. Then today (I changed the waste toner yesterday) the message happens again. I have tried all the suggestions on the forums:
Turnign off and on
Tried a different toner cartridge
Taken the imaging drum out and cleaned.
The only thing I haven't done is buy a new imaging drum (as seems an extreme fix if this isn't the issue).
Does anyone have any ideas of what else I can try before accepting defeat and either getting a new printer or a new imaging drum.