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fine blue line on touch screen.

When the touch screen is used a fine blue line follows your finger like a pen stroke and remains until the window is changed. Also a small section of the entire top border of the screen is a lighter shade with small numbers... Any Ideas???:thinking:

While you came to the right place, you will need to provide more info about your device (i.e. Device model, Android version, etc) so we can help.
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