my phone has a similar problem to above joystick wont go down or to the right and 1,2,3 keys unresponsive also will power on with the power button but not off. I can see nothing on the inside that looks damaged but apparently this was caused by water damage any idea how to fix?

You haven't finished flash.. you have to customize file system..
if you use XS++ it can take some time

I my K750 also key problem, BUT additionally I can switch on it with the power swich, but can not switch off it. What could be the problem?

i have repaired k750 keypad problem by writting gdfs with usb smart b4, u can try m8

w800i keypad 1,4,7,* not working pls give a solution