Please follow steps below for troubleshooting：
- Reboot your tablet and launch Camera again
- Tap Camera switching icon on screen to switch to the other camera if your tablet has two cameras. If one has black display, you may have to send your tablet for repair
- Access Safe Mode by long pressing power key > tapping and holding Power Off > tapping OK
If your tablet works well in Safe Mode, there may be some 3rd apps that cause malfunction
Please reboot your tablet and check again if it works well
- Backup your data and perform factory data reset
