Canon Pixma Printer (Little Bloxwich WS3)

Approx 4 to 5 years old printer with a fault. Changed change ink in the printer, however, the printer states there isn't an ink cartridge inserted when there is. If your good at tinkering with stuff this may well be up you alley as they say .......... would rather try on here first before throwing it into landfill, as I suspect there is still probably quite a bit of life in it.