If your LCD screen is displaying the 'tEL' icon, it is to indicate that the camera is connected to a TV via the HD or AV component cables for photo/video playback.
If 'tEL' is being displayed while no HD or AV cable is connected to the camera, then there is a fault. It could be a one time glitch being caused by a bad connection in the TV port in the camera. Please try the following:
- Remove the battery from the camera.
- Insert and remove the HD and AV component cables from the TV output ports to clear up any possible faulty connection.
- Reinsert the battery into the camera.
- Power on the camera once more.
If the camera is still displaying 'tEL' with no cables connected after following the above steps, then unfortunately there could be a fault with the camera. If so, please contact GoPro Customer Support for further assistance, by using the link at the lower right hand of the page.