The error code B203 on your Canon MG7520 printer typically indicates a problem with the print head or an issue with the printer's internal hardware. Here are some steps you can try to troubleshoot the issue:
# ***Restart the Printer***: Turn off the printer, unplug it from the power source, wait for about 10 minutes, then plug it back in and turn it on.
# ***Check for Paper Jams***: Open the printer and check for any paper jams or obstructions that might be causing the error.
# ***Check Ink Cartridges***: Make sure the ink cartridges are properly installed. Remove and reinsert them, ensuring they click into place.
# ***Clean the Print Head***: You can try to clean the print head using the printer's maintenance menu. Refer to your user manual for instructions on how to do this.
# ***Reset the Printer***: If the issue persists, you can try resetting the printer to its factory settings. Again, refer to your user manual for steps on how to do this.
# ***Contact Support***: If none of these steps work, it may be a hardware issue that requires professional assistance. Contact Canon support or a local technician for further help.