Printer wont recognize toner cartridge

Hi,
Are these Canon original cartridges or knock-offs?
WMT

run clean cartridge option also run align cartridge option

You arn't clear whether this message appeared with the old toner cartridge or just with the new cartridge.
If this message just appeared with the new cartridge and not the old one, take it back and get a replacement cartridge.
If the message also appeared with the old cartridge, the printer has a problem with the drum ground connector on the high voltage power supply.

Install Toner .When this copier is not recognized toner cartridge.If is not this model cartridge or some of missing.please check it properly.You can get an idea install your old cartridge.If the same massage,please check your printer any parts were broken.

First of all, I wouldn't spend 10 cents on this printer at this point, but is there a toner cartridge installed? It could be empty, and it's probably not going to print very well after all this time anyway. Try giving it a few shakes side to side to loosen any toner that may be inside, if that doesn't get it going, then pick up a new laser printer for $70-$100 (basically the price of a replacement toner cartridge)

You don't. HP printers seem to be very particular about this.  Take it back and get the exact replacment, including the brand. 

changed black K cartridge with new one but still shows black toner empty! Could toner cartridge be faulty?

Toss it.

These are 'disposable' printers. You can get a new one for less money than it would cost to fix.