Question about Canon PIXMA MP780 All-In-One InkJet Printer
I removed the print head and thoroughly cleaned it. My printer still won't operate at all. The power button continues to alternately flash between green and orange. The online manual says that means the waste ink tank is completely full. Where is the waste ink tank and how do I go about cleaning it? Should I buy a new print head? Is there hope or should I just buy a new printer? Thanks!
There is a cleaning solution sold on E-bay for Cannon i470D print heads.
Or you can try a little ammonia. I used a cap full of ammonia in each side of the print head where the ink tanks go.
Put the print head in a can and let it set in the ammonia for 5-15 minutes then blot dry with paper towels and let stand until dry.
Then run the maint routines for the print head found under properties/maintance.
Posted on Jan 10, 2009
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Posted on Jan 02, 2017
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