Canon 2677B002 SX80 Manual - Page 126
You cannot operate the remote control
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Troubleshooting ■You cannot operate the remote control. Cause Batteries are not installed properly or they have run out. You are operating the remote control from the outside of the remote control operating range. There is an obstacle between the projector and the remote control. You are operating the remote control under an inappropriate operating environment. The channel setting of the remote control does not match with the setting of the projector. The key lock function is prohibiting the remote control operation. Countermeasure Check whether batteries are installed correctly. If batteries are installed correctly, replace them with new batteries. (P28) Check whether you are operating the remote control within the remote control operating range. (P28) Remove the obstacle between the infrared remote receiver of the projector and the remote control or point the remote control to an obstacle-free path. Check whether the infrared remote receiver of the projector is exposed to direct sunlight or strong light of lighting apparatus. (P28) Check whether the channel setting of the remote control has been changed. You can check the [Remote control] setting in the [System settings] menu. (P96) Check whether [Key lock] is enabled to disable the remote control operation. In the System settings menu, set [Key lock] to [Off]. (P94) 126