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Temporary Scribble line on Screen when Scrolling
I'm a newbie to this forum so hi to all.
Today I bought an Asus MemoPad ME173x and have just updated it from 4.2 to 4.4.2. Suddenly now when I scroll the screen I'm getting a temporary thin blue scribble line on the screen. When I scroll again this first line disappears but is replaced by the next scroll trail line.
Can anyone explain where this trail line is coming from please? I can't see any background drawing apps that might be causing it.
Many thanks for any help.