Hi
atoboyThank you for your asking. Kindly provide the information below so that we could better assist you.
1. Your current firmware version
Setting >System>About Phone>Software information
If you try to update to the latest version, does the issue still remain?
2. Does the issue appear after any system/apps download or upgrade?
3. Please try clearing cache & storage of Camera (long press "Camera">App Info>Storage & memory>Clear cache/Clear storage), and try to re-install 3rd party camera apps and check again.
4. Please try to enter "Safe Mode". If the function works well in Safe Mode yet the issue remains out of Safe Mode, please check on any disturbance from the installed 3rd party apps.
# How to enter and exit "Safe Mode"
https://www.asus.com/support/FAQ/1005163/5. Please check on SMMI test, could the device pass the SMMI test?
Calculator> type ".12345+=">SMMI TEST>Single Test>Wide-angled Camera Capture Test/Tele Camera Capture Test/Front Camera Capture Test
*If your SMMI test is pass, please try "the Factory Reset"
Settings>System>Reset options>Erase all data(factory reset)
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.
If you have any further queries, please do not hesitate to contact me.