Touch acts randomly when connected to PC via USB

[RG8]

Hey guys. WHen i connect my phone to PC via USB Cable, touch acts weird. when i try to type, random alphabets get typed, somtimes screen keeps on scrolling itself, aometimes when the homepage menu to add themes and widgets to homescreen (which only opens if you long press the home screen) opens. Any solution? I'v tried different PC and two different USB Cables.

[_alexdon_]

This could be software issue.Have you tried repairing phone software until now?

[RG8]

About a month ago, my Motherboard got damaged. I gave it to customer care, this problem was also there but I forgot to mention. They first repaired my phone by whatever software they use, updated it and then changed the motherboard. The touch problem was there before the repair and is still there. My warranty period is over now.

[_alexdon_]

I think you need to have your phone checked,there could still be issues on the MB.