OK, in order to isolate the issue we should try with genuine cartridges (not refilled). If you still get the issue using those, then I am afraid the printhead is defective. In that case we can use a printhead cleaning kit for your printer, like this one ===> Canon MG6460 Printhead Cleaning Kit <=== CLICK HERE
After cleaning the printhead with the cleaning kit, the issue should be gone. Otherwise you can try buying a new printhead but it is usually not worth it (usually it is more expensive than a new printer).
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