Question about Canon PIXMA MP780 All-In-One InkJet Printer
Remove print head and mix 1 oz. ammonia to 180 degree 8 oz. hot water for 30 minutes.
Completely dry unit with air duster etc. and put back into machine.
Do a nozzle check and see if it gets better if so try a deep clean or redo step 1.
If no black a new print head is needed and I have one.
Posted on Feb 14, 2014
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Posted on Jan 02, 2017
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