Help touch screen trouble

[zebdog]

when using touch screen the right hand side doesnt work.
if i type a message i cannot use the delete key on the right if i turn the phone around into landscape i can use the delete key but not any of the keys on the bottom row,I.E the ?123 < @ space . or next. when i press any of these keys the one above highlights and types.can anyone help me solve this.the phone has not been modified or had anything altered since i got it.

 

[Rukbat]

There are a few possibilities - a bad touchscren, a broken wire (wires can break due to stress or to being laid out wrong when the phone is put together), a bad connector, a bad component on the motherboard ...

The phone has to be brought into a shop and diagnosed. If you replaced all the possible causes (asuming you didn't break anything while doing it - which is what usually happens), you'd pay more than a good used phone sells for, and that's about the only alternative. (Replacing the touch screen, if you're not experienced, is going to result in your breaking the screen at best, requiring a whole screen replacement.)