Why are random characters and lines are appearing on my display?
Random characters or lines appearing on your display could be caused a few different settings.
Owner Info
You may have inadvertently typed some random characters in the Lock screen message section of your device.
Please follow the instructions below to check or change the Lock screen message:
- Touch
- Touch Settings
- Touch Security
- Touch next to Screen Lock.
- Touch Lock screen message
Developer Options
If you have previously enabled Developer options, you may have accidentally enabled a User Interface option under the Developer Options. Your device has several developer options that can be used by application developers when testing applications.
Please follow the instructions below to check the developer options that may have been enabled on your device:
- Touch
- Touch Settings
- Touch Developer options
- Uncheck or turn off any options selected under Input and Monitoring
Options under Input
Show Taps - Show visual feedback for touches
Pointer Location - Screen overlay showing current touch data
Options under Monitoring
Strict mode enabled
Profile GPU rendering