From: f0rum on

Reset Printer Canon BJC-3000/6x00/7x00/8000

1. Power off printer
2. Hold Resume button then press and hold POWER, the beeper will
sound once.
3. Hold POWER and release RESUME
4. Press RESUME twice
5. When the indicator lights steady, press RESUME three(3) times.
The indicator should be orange.
6. Press Power to set data

more on 'Free Resetter Software'
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epson 'Epson Resetter Printer Service Manual and Repair'
(http://epsonresetter.blogspot.com)