Using printer canon pixma pro 9000 for a couple of years. Started having issues, the printer is telling me that the ink is empty but when I remove the ink tank it's still half full. Thinking that its a printer issue i went and purchased a brand new never used printer from ebay. Put in ink tank got the same message that ink is empty, but the tank is still half full. What could be the issue? I'm using a new printer and a new print head.
