Solution
When the message "**** (*1) Printer error has occurred. Turn off power then back on again. If problem persists, see the manual." is displayed, there may be a problem inside the printer.
(*1): "****" is displayed with alphanumeric one-byte characters.
⋖Solution⋗
Turn OFF the printer, and unplug the power cord. Then, turn ON the printer again.
If the problem persists, contact the service center.
⋖Error Code⋗
5011, 5012, 6500, 6900, 6901, 6910, 6911, 6902, 6930, 6931, 6932, 6933, 6934, 6935, 6936, 6937, 6938, 6940, 6941, 6942, 6943, 6944, 6945, 6946, 6800, 6801, 5400, 6B10, 6A81, 5200, 5C00, 5C20, C000, 6B20, 6502
Request for a repair service
Request either Canon or the dealer you purchased the machine for a repair service.