Unfortunately, Tony, there is no quick or easy fix here. This message indicates a hardware problem, specifically that that the internal "ink absorber system" is full. Even though you've actually removed and cleaned the pad, the printer will not allow any functionality until the counter is reset. This is a process that can only be done by an authorized canon service center, as special software is required that is not available to the end user. This service is generally not practical though - it's going to run you $150-250 for repairs, which just isn't worth it for an older printer. This is a 5 year old model, that was built for a service life of 3 years. If you have reached the point that the absorber has filled, then other wear items like the printhead, feed rollers, etc are also going to be at the end of their lives and need service/replacement soon.
Given the costs and complexity of fixing this issue, you'd be better off replacing the printer. You can get a brand new and better machine, with current technology and a fresh warranty, for about $80, which makes more sense than investing in the older machine.
I can recommend replacement options for you if you'd like, or if you'd prefer to try having it serviced I can advise further on those options. Replacement would be your best bet though, economically speaking.
Best regards, ***** ***** for the news,