problem:
customer broughten the laptop and reported,no action on keypad for few days.once receive the laptop and testify that part completely.to discover the trouble .cross check the connector .damage or well.cross check the voltage,obtaining or not,refixx the keypad ,its hang or not.finally find,problem in keypad.
solution:this type of problem will not solve itself.because its shorten on circuit.once situate fresh.its performs well.