Some vendors sell refills indicate that they are "compatible" and not the genuine item. If you paid about 1/2 price, that's the clue.
I have a PagePro 1350W laser printer that will not recognize a Konica Minolta Toner Cartridge. When I try to print it returns an error that the Toner Cartridge is not a Genuine Minolta cartridge.
Have tried to solve problem by re-installing print driver, inserting new cartridge etc. On line at Konica Minolta web site is useless. Viewed all manuals, FAQS etc and cannot find any reference to this issue.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic