Canon BJC-55 User Manual page 326

I "Error Number: *300" appears on the screen and print job does
not execute
This is a Macintosh error message where the * is replaced with a letter.
Make sure that the printer is turned on
Make sure that the POWER light is green. When the POWER light is flashing green, the
printer is warming up. Wait a few moments for the POWER light to stop flashing. The printer
is ready when the green POWER light remains on.
Printer does not turn on
Check the printer and the interface cable
Check the printer status and the connection of the printer interface cable connections.
Check interface cable connections at the printer and computer
Check to see if the background printing is operating properly
Follow this procedure to disable background printing and try to execute the print job again.
1
From the Apple menu, choose Chooser.
2
Click the BJC-55 icon.
Problems and Solutions
Macintosh
Troubleshooting 326