When a track is physically broken, you must bypass the damage with a "jumper"—a thin insulated copper wire.
Remove the battery for a few seconds to clear temporary software glitches that might make buttons seem unresponsive.
If the hardware is intact but the keys are behaving erratically, type *#7370# on the home screen (default security code is 12345 ) to restore original settings. nokia 105 rm 908 keypad ways
If a series resistor is found to be open-circuit (shows GR on one side but not the other), you can sometimes "short" or bridge the resistor to restore the path.
Use isopropyl alcohol to remove oxidation from the button pads. When a track is physically broken, you must
Every button has an inner and an outer circle.
Often connected to a ground or a different signal group. If a series resistor is found to be
Repairing a Nokia 105 RM-908 with keypad issues requires understanding the track connections (ways) between the physical buttons and the central processing unit (CPU). This model typically uses a grid-based connection system where multiple keys share common signal lines. Common Causes of Keypad Failure
If a specific key (e.g., the number 5) isn't working, check for continuity between its pad and the pads of nearby keys. If they share a "way" but the connection is open, you have a broken track.
Since the keypad lines lead directly to the MediaTek CPU, a loose or damaged chip can cause entire rows or columns of buttons to fail. Troubleshooting the Keypad Ways