If your Canon iP8780 suddenly refuses to print and shows a maintenance or service warning, the ink absorber counter may have reached its limit.

Ink absorber pads store waste ink during normal operation. Canon firmware tracks this using a software counter and may stop printing when it reaches the limit.

This page is prepared for Canon iP8780. Service mode instructions are shown only when a matching series procedure is known.

Common Symptoms

• Service / maintenance warning on the screen or driver
• Printer refuses to print even with ink available
• Blinking lights and queued jobs fail
• Error reappears after restart

Perform the Waste Ink Counter Reset

Once the counter is cleared, Canon iP8780 should exit the locked state and printing should resume normally.

Warnings

Treat the reset as a maintenance step. If your printer has extremely high usage, consider cleaning/replacing absorber pads to avoid overflow.

Reset tools and instructions

Use a reliable USB connection and follow the steps in order.

Troubleshooting

• Close other Canon printer utilities while resetting.
• Power-cycle the printer and try again.
• Use the correct Stop/Reset press count for your series.
• Try a different USB cable/port if using PC software.
• Repeat the service mode steps carefully (timing matters).

Frequently Asked Questions