Why does my touch start malfunctioning some time?

A

AC Question

Touch start malfunctioning some time.

Sir, I have QMobile A600 with 5" touch display.

After replacing its touch It is working fine, but some times it start malfunctioning, especially on the lower buttons like menu button keep pressing and does not recognize right place of touch instead feels totally wrong.
But when I press the power button and screen goes blank and again pressing power button brings the lock screen, now it start working normal just like it has no issue at all.

I am totally confuse how to resolve this issue. Please advice how to cope with this.
 

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