Not long ago I purchased some ink, filled up my Canon ink cartridges, put them back in the printer and did a test print (which went fine) but noticed that the Printer did not recognize that the ink cartridges were full.
I did a bit of investigating and found out that the reason for this is that Canon (and many others) ink cartridges have an electronic chip which expires after the ink cartridge becomes empty. This becomes a pain in the neck because the Printer cannot show the Ink Level Status.
How To Reset Ink Cartridge Chip
I saw a guy in the local Ink Cartridge shop resetting an ink cartridge with a little gadget called a Chip Resetter. He simply slid the the cartridge down, held it for a few seconds, and presto, the refilled cartridge was ready for use.
So I went Online shopping for a Chip Resetter and purchased one for my Canon printer on eBay. Note: Chip Resetters are available for most popular ink cartridges with an electronic chip. The good news is that more and more manufacturers are making them these days which means they are cheap to buy!
Before buying the Chip Resetter I was buying Ink Cartridges from the guy at the local shop. He would fill them up, reset the chip and sell them on. But this was still expensive compared to buying ink cheap, filling the cartridges, and resetting the chip myself.