Slow response of touch screen.
Reasons of Problems
Phone’s touch screen is damaged due to any physical collision.
Touch Screen IC might be faulty.
Loose connection of touch screen connector with board.
Screen might be broken which also affected touch screen.
Dry soldering of touch screen on-board connector.
Connector strip might be damaged.
Factory reset your phone, but make sure that you take the data backup of your entire phone.The very first thing that you need to do is to unplug, clean and reconnect touch screen connector strip and check, in most cases this has found to be a good and effective solution of this problem.
Make sure that you check touch of your phone after performing every step, and also make sure that you turn the screen of before disconnecting display screen.
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