Be sure to test your device after completing each of the following workarounds to see if the problem is resolved. Otherwise, continue to the next available resolution procedure/recommendation.
1. Make sure you are using the built-in camera application on your phone. In case you are using a third-party application, you can try to disable the third-party app temporarily, switch to the built-in camera, and see if the problem remains.
If problem persists after disabling the third-party app, then it means the culprit is most likely on the phone itself, could be a glitch on the software or hardware. In this case, you need to continue troubleshooting your device.
If the problem is gone, then it's the third-party camera app that is causing you trouble. In this case, you can either contact the app developer for further troubleshooting assistance or uninstall it and use the built-in camera app instead.
2. Also ensure your phone's camera is 5MP (megapixels) or higher. Because if the camera is 4MP or lower, the picture quality may not be that good, vibrant or crisp.
3. If you are using a phone cover or case, make sure it is not covering the camera lens. You can try to remove it and see if there are any improvement afterwards.
4. Also verify your phone resolution settings and ensure they are set to high resolution pictures.
5. Turn off special effects.
6. Check your phone's camera lens and make sure there are no scratches or dirt. You can clean the lens with a dry, soft, lint-free fabric.
7. Perform a soft reset. The process is done by turning off the phone for about 30 seconds, and then turn it back on afterwards. It's the same when you power off the phone, then remove and re-insert the battery, then turn it back on.
8. Clear cache of the camera app only.
Sometimes, all we have to do is clear the app's cache so as to eliminate cached data that have been corrupted. Here's how to clear camera app cache and data on the Galaxy S4:
- From the Home screen, swipe down the Status bar.
- Tap the Settings icon (wheel-like icon) on the upper-right of the screen.
- From the Settings screen, tap to open the MORE tab.
- Scroll to and tap to select Application Manager under System manager.
- Swipe left to ALL tab from the Application Manager screen.
- Scroll to and tap the Camera application.
- Scroll to and tap the Clear Cache button from the App Info screen. The camera app cache is now cleared.
You can also tap the Force Close button to force close the application, or the clear data button to clear the application data. However, clearing of the application data may affect some of your camera preferences and settings. That being said, be sure to back them app beforehand. Force close on the other hand will force stop the app from running.
After clearing the camera app cache, reboot your phone and then check if the camera is already working fine.
9. Wipe the cache partition on the Galaxy S4
If the problem continues after clearing the camera app cache, then you can try wiping the cache partition on your phone. Wiping cache partition will empty contents/files of the cache partition.
Here's how to do it:
a. Power off your device.
b. Press and hold the Volume Up, Home, and Power buttons simultaneously.
c. When the phone vibrates, release the Power button while keep holding down the Volume up and Home keys.
d. When the Android System Recovery displays, release the other keys.
e. Use the Volume down key to highlight Wipe Cache Partition from the given options.
f. Press the Power key confirm selection.
g. Wait for the process to complete and then test your phone's camera to see if that fixed the problem.
User-defined Fix for Camera Failed Error on Samsung Galaxy S4
This method has been used by a Galaxy S4 user who has encountered a "Camera Failed" error while using the camera app, and then shared this solution via relevant forum post. You too can try this if you want.
1. Connect your phone to a laptop using data cable.
2. Go to: Computer\SAMSUNG-SGH-I747\Phone\Applidium Image Cache
3. Delete everything in this directory or folder.
4. Next, go to: Computer\SAMSUNG-SGH-I747\Phone\Android\data\com.sec.android.gallery3d\cache
5. Delete everything in this directory or folder.
6. Restart your device and then test the camera.
If the problem is still not fixed, then your last resort would be a hard reset. The process will erase all files from your device and restore it to factory defaults. It means all your personal information will be deleted. If you want to do it, better back up all your files first for easier recovery after the process.
To perform a hard reset, go to Settings->Accounts, and then tap on the Reset key, followed by Factory Data Reset. Finally, tap on Delete All.
If you don't want to perform a hard reset, then please contact Samsung Support or your phone carrier to escalate the issue for further troubleshooting and recommendations. In case you are prompted with an error message or code, be sure to take note of it and give it to the support representative for faster and easier troubleshooting.