Nokia N78 keypad malfunction solution with keypad filter IC jumper ways solution

Here's a solution that may help fix and repair Nokia N78 keypad failure or malfunction. If you already tried to replace the keypad flex cable but the problem still exists, this solution below will show you the keypad filter IC that is being connected to eah particular keys within the keypad matrix.

N78 Keypad Filter IC connection tracks

You may trace each particular line paths for deep keypad repair troubleshooting.