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This can happen to cartridges with attached print heads such as HP, Lexmark or Dell. All cartridges are weighed and tested before leaving the factory so lack of ink isn't the problem. It usually has to do with the print head of the cartridge not having any ink to feed it. This happens because cartridges are kept flat or upside down for weeks or months before being used and the ink settles away from the print head. The easiest remedy is to open the box and stand the cartridge upright for a few minutes before using. Then get a damp paper towel, fold it into quarters and sit the cartridge print head down onto it. Hold the cartridge down to the damp paper towel for three minutes. This will help pull the ink out of the print heads, priming them and getting them ready to print. Finally, install the cartridge into your printer and print a few test pages.
Try it a few more times, if that doesn't work, you'll have to get a new cartridge. (I believe your cartridge comes with a new head, it's actually the printing head that you need) Canon cartridges are infamous for failing for no apparent reason.
Those cartridges have a little chip that tells the printer that it's there. Check the contacts on the cartridge. If the old one is still recognized and the new one is not, then return the new one and get it exchanged.
How I can fix the U051 problem with my conno : MP470 printer ? It says the print head is not installed. Install the print head. Where is the it , and how I can fix it?
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You can remove magenta & double check that some tape was not left behind on the contacts. Take a clean ragg & dampen it with alcohol. Clean the ink cartridge's (copper contacts & inside the the ink carrige). Re-install the magenta, (tight fit). Power off the printer. Wait a few seconds & power it back up. If it fails a second time with no other errors. Like the above. Than the magenta may be defective. Have a recipt? Return it for a replacment.
Other forums report this problem as a faulty ink cartridge that cannot be recognized or gets recognized as the wrong color. Calling canon tech support will usually result in a free replacement from Canon. If not, try purchasing a new cart before ditching the printer.