Canon has released firmware Version 1.0.4 for the EOS 6D Mark II which incorporates the following fix:
• Corrects a phenomenon in which in rare instances, the operation buttons and some touch panel functions do not respond.
This update is for cameras with firmware up to Version 1.0.3. If the camera's firmware is already Version 1.0.4, it is not necessary to update the firmware.
When updating the firmware of the camera, Canon recommends that you review the instructions thoroughly before you download the firmware.
Download links:
Canon UK
Canon USA
• Corrects a phenomenon in which in rare instances, the operation buttons and some touch panel functions do not respond.
This update is for cameras with firmware up to Version 1.0.3. If the camera's firmware is already Version 1.0.4, it is not necessary to update the firmware.
When updating the firmware of the camera, Canon recommends that you review the instructions thoroughly before you download the firmware.
Download links:
Canon UK
Canon USA