We have a P4014dn printer, and after ~10000 pages we replaced the toner with a genuine HP 64x (CC364x) toner, whis is supposed to provide 25000 pages.
We have just reached 20093 pages and we are out of toner. There is no error or anything displayed (the printer still thinks the toner is fine!), but we only get very faint or blank pages now. Maybe half a good page of we take the toner out and tilt it around a bit.
All we print is text (no images) so the use should be typical. Basically, instead of 25000 pages we only got 10000pages out of this expensive toner !!!!
It sounds suspiciously like our extended toner only contains the amount of toner for the regular (64a) cartridge.
Was there a known production mistake?
The serial number (?) on the toner is 1K11S6a.