Power down the Canon Pixma IP4300. Once it has shut down, leave it off for a few moments.
Hold down both the "Resume" button and the "Power Button." When the printer begins to restart, release the "Resume" button but continue pressing "Power."
Push in the "Resume" button twice, then let go of both the buttons. In a moment, a green light flashes a few times.
Press the "Resume" button four times once the green flashing has finished.
Push the "Power" button again until the printer shuts down. Wait a few seconds, then press the power button again to restart the device. The Canon Pixma IP4300 will now function properly. for more information
http://www.fixyourownprinter.com/forums/printer/67824 hope this helps you.
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