Canon A60 - Manual (Page 194)

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Waste tank full: You can restart printing by pressing the
RESUME/CANCEL button on Bubble Jet
Printer. Please request replacement of the
waste tank at your nearest Canon
customer support center listed in the
Bubble Jet Quick Start Guide.
Printer error: Turn off the printer, then turn it on again. If
the error persists, please consult your
nearest Canon customer support center
listed in the Bubble Jet Quick Start Guide.