Origineel bericht door: digitaldoctor ,
I have a Laserjet pro 200 and received the message that I was using non-genuine HP toner. Only the black would work as it was an original HP. I heard that HP was forced to stop blocking the use of non-original HP toner ... and a firmware update would resolve the issue. And it did ! My original firmware was from 2012. I just updated it 10 min ago ... and the new non-genuine toner works now. Try a firmware update.