Lenovo

Random characters and lines are appearing on my display

Why are random characters and lines are appearing on my display?


If you are noticing random characters and lines appearing on your display,  you may have accidently 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:

1.  Touch Image 

2.  Touch Settings   

3.  Touch Developer options

4.  Uncheck any options selected under Input and Monitoring

Options under Input

Show Touches
Pointer Location

Options under Monitoring

Strict mode enabled
Show CPU usage
Profile GPU rendering
Enable traces - Ensure that no traces are currently enabled


 

Show Touches


Show visual feedback

for touches

    Image

CPU Usage

Screen overlay on the right side of the screen showing current CPU usage

    Image
 

Pointer Location

Screen overlay showing current touch data

    Image

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