Canon EOS-1DX Instruction Manual page 397

Sensor Cleaning Problems
The shutter makes a noise during sensor cleaning.
If you selected [Clean nowf], the shutter will make a noise, but no
picture is taken (p.300).
Automatic sensor cleaning does not work.
If you repeatedly turn the power switch <1> and <2> at a short
interval, the <f> icon may not appear (p.38).
Printing-Related Problems
There are fewer printing effects than listed in the instruction
manual.
What is displayed on the screen differs depending on the printer. This
instruction manual lists all the printing effects available (p.310).
Image Transfer Problems
I cannot transfer images to a personal computer.
Install the provided software (EOS DIGITAL Solution Disk CD-ROM)
on the personal computer (p.427).
Check that EOS Utility's top screen appears.
Troubleshooting Guide
397