Yes, it is possible to fix the GoPro Hero 3. For more detailed information please visit the teardown at: GoPro Hero3 Repair. You can find all the necessary parts in the iFixit US Store: https://www.ifixit.com/Store/Parts/GoPro-Hero3-White If you find a time you can document the repair in form of a guide and upload it to our repair guide section for the GoPro Hero 3
You can try a reset: - Turn on the HP device - Unplug the power cord to the unit while it is switched on - Keep the power cord within reach - Press "#" (hash) and "6" (six) at the same time and keep them - Plug the power cord back in while pushing the buttons If the message on the display: "Initialization", "Semi-Full reset" or "Semi-NVM Reset" appears, release the buttons. Then set the country and language again. By this reset the electronics of the HP device is reinitialised and overwritten or formatted in this context, the device's internal memory.