Question about Canon PIXMA MP780 All-In-One InkJet Printer
Dear Kol emerald
Sounds like a hardware error on the printhead of the printer as it controlled by an Integrated Logical Circuit. (ID circuit) and the cartidge is being indicated that it is defective.
Even if you get a third one I guess it will happen again.
Sorry to tell you this but you may have to go to a repair service center for a new MP780 Printhead (QY6-0049-000)
If you want to do a hard reset of the printer try this, but with few hopes :)
Posted on Apr 04, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
In most cases the printer driver software can have errors while being in use or is shut down. So to reset remove your printer from the PC and uninstall the printer software. Now reinstall the printer software and then connect the Printer to be detected as a new hardware as it will be installed. Now check the printer properties to see the ink levels.
Activate head cleaning before a test is taken . Sometimes it is possible that the head is not reacting to the need of the PC command or can be an issue with ink drying or poor ink cartridge contacts. Sometimes the power supply unit must be checked as a poor SMPS unit can deliver low voltage and cause issues to the printer function. Check all the leads and connections of the mother board , the tags to the ink cartridge. Also check the mechanical settings of the ink cartridge , if jammed or tight remove motor and manually free the drive before it is set back.
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