That's because there may be foreign objects in the printer, which hinders the operation of the ink cartridge. Please cancel printing, turn off the machine, and then take out the foreign matter. If continuous supply is installed, adjust the continuous supply pipeline, that is, the pipeline fixed in the printer. Not long, not short. This will solve the problem. If it is determined that it is not the previous problem, it may be the machine hardware problem. Get Canon after-sales inspection and maintenance.

The yellow light and the green light flash alternately for seven times, indicating that your printer needs to be zeroed. The method is as follows: 1. Turn it off. 2. Press the power supply+resume starting the machine. 3. Press and hold the power to put the resume, and double-click the resume twice. 4. Press RESUME4 and clear it. Note: If the above operations are still invalid, you can only contact after-sales liquidation.