Mobile key failure solutions
1, above the printed circuit board is broken, will lead to keyboard signals can not be transmitted to the processor chip.
2, if only part of the key failure, the phone keypad is generally dirty keyboard. If all keyboard failure, it is a problem with the interface or a processor chip.
3, mobile phone key failure, most of the phone's keypad is dirty or oxidized, clean look on it.
4, it may be a keyboard and motherboard interface appears Weld phenomenon.
5, the phone keypad keyboard processor chip damage caused by failure.