Simultaneously press 3 keys
Volume Up + Home + Power:Wait for the device to vibrate, release the Power button, and only hold the
Volume Up + Home buttons. The display screen will enter Recovery Mode
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3. Use the volume down key to navigate to wipe cache partition and press the power key to select. To proceed, choose Yes
4. After the deletion, navigate to Reboot System Now and press the power key to select. Your device will restart, and you can check if your camera is working normally
Method 3: Restore Factory Settings
In this article, I'll guide you on restoring factory settings through a Hard Reset to fix the issue of the camera not starting
1. First, repeat steps 1 and 2 of method 2 to enter Recovery Mode. I'm not guiding you to do this right away because it's a factory reset, and you'll lose all your data and installed apps. Before proceeding, back up all your important data. Readers can refer to how to Back Up Data on Android devices here
2. Next, use the volume down key to move to wipe data / factory reset and press the power key to select. To confirm the deletion of all data, choose Yes when prompted by the device. If you haven't done method 2 and are directly performing method 3, also wipe the wipe cache partition
3. Restart the device by using the volume key to move to Reboot System Now.
Through these methods, many people have successfully resolved the issue of the camera not starting on the Galaxy S3. If you've tried these methods and it still doesn't work, take your device to the service center for a more thorough examination.
