Click here for information on how to clean metal contacts. Dirt or damage on the contacts inside the printer, or on the cartridges can prevent the contacts from connecting and can stop the printer from reading the information on the chip. The new ink or toner cartridge has a number of metal contacts that connect to similar metal contacts in the printer allowing them to communicate. Solution: – Take the cartridge out of your printer and make sure all strips, tabs or plastic covers are removed before installing the cartridge again.ĭirty / damaged contacts stop chip data from being read: Problem: – You forgot to remove protective covers or plastic strips that are attached to a new cartridge when you first take it out of its packaging.

Click here for the solution below on how to fix this However, sometimes the printer just doesn’t do that correctly and believes that the old one, or no cartridge, is currently inserted instead. Your printer should automatically recognise when you install a new cartridge and reset its internal memory, ensuring that it’s displaying full ink and toner levels. Here are the most common reasons why your printer isn’t recognising a cartridge: A message on your printer warning ‘ no cartridge installed‘, ‘ cartridge not recognised‘, or words to that effect.An HP Printer displaying ‘ cartridge error‘, ‘ HP cartridges locked‘, ‘ cartridge protection enabled‘ or ‘ HP ink cartridge not compatible‘.

A low or empty level of ink and toner is displayed on your computer.

Your printer says ‘ printer cartridge not detected,‘ or your printer cannot detect ink.

Your printer says ‘ toner is not compatible.‘.

There may be occasions when, after installing a new ink or toner cartridge in your printer, you might see a message on your printer like: Computer error message when printer cartridge not recognised.

Canon mp490 printer