trend 786 keypad problem
 

I have a trend 786.
its 4 5 6 keys r not working.
set is not water damge,
any solution?

try re hote bord
......................

when I put finger on key 4 and press other key like 3 or 7 ,
it write 4 but when I press only 4 it doesnt work.
other keys 5 and 6 r also making same problem.
also these three keys react very slow.
while other keys work properly.
I have reball its flash chip and cpu.
but still same condition.

check its cencer setting calibration