Touch pad of One Row in my LG-P970 is not working.

John Meshach, it has been my experience that if a particular area on the digitizer has seized to work, the digitizer has failed and needs to be replaced. Of course you always want to make sure that all the ribbon cables are properly connected and that there is no tear in any of the cables. There is also the remote chance that the touch screen controller has failed, but it is very unlikely. The part number for the digitizer (Touch window assembly) is EBD61045401 and you'll find the guide right here.. Here is the algorithm for a quick test

START

Check the touch connector and reconnect the touch connector

Touch is OK?

Yes

End

No

Check power

3.0V TOUCH (TP1)

1.8V TOUCH (TP2)

Yes

No

Change the main Board

Work well?

Yes

END

No

Change the touch module