Canon EOS 80D - Manual (Page 490)

Troubleshooting Guide
490
 If the camera is connected to a computer, GPS receiver, or other
device with an interface cable, wireless functions cannot be set ([51:
Wireless communication settings] will be grayed out). Disconnect
the interface cable before changing any settings.
 Refer to the Wireless Function Instruction Manual.
 Set the <R> switch downward (lock release, p.54).
 Check the [54: Multi function lock] setting (p.54).
 Check the [8C.Fn III -4: Custom Controls] setting (p.433).
 Check if your finger is blocking the speaker (p.26).
 Check if [53: Touch control] is set to [Standard] or [Sensitive]
(p.63).
Wireless Functions
Wireless functions cannot be set.
Operation Problems
I cannot change the setting with the <6>, <5>, <9>,
or touch screen.
A camera button or dial does not work as expected.
During touch screen operations, the beeper suddenly
sounds softer.
Touch screen operation is not possible.