If you take a lot of photos and videos with your GoPro Hero 4 while on vacation or on the move, then under certain circumstances the camera suddenly stops responding to inputs via the touchscreen or the buttons.
Especially if you are underwater, good advice is expensive, because quickly open the underwater housing is of course not possible. That does not matter! Because we will explain step by step, how to proceed with the GoPro Hero 4, if it does not react correctly:
To do this, press and hold the Power On / Off button of the GoPro Hero 4 for about 15 seconds. The camera will then restart automatically and you can then use it again normally. The error should then no longer appear.
If it does, then this is very often due to a memory card that is too slow for the camera's large data rates and data volumes. Here you can either copy pictures and videos to a PC, so that the GoPro memory card has less data or switch to a faster Micro SD memory card.
Fast Micro SD cards are no longer very expensive and can be purchased on Amazon, for example.
You now know how to proceed when the GoPro Hero 4 shows no reaction and how to continue filming quickly.