If a whole row or column of keys fails (e.g., 1, 2, 3), it means a single "track" shared by those keys has been cut.
Look for green or dark spots on the tracks, which indicate water damage. nokia 105 rm 908 keypad ways
Touch the red probe to the inner core, and then the outer ring, of the dead key. If a whole row or column of keys fails (e
: Always use 0.02mm insulated enamel copper jumper wire . This thin size ensures the wire sits flat and does not push up against the white sticker membrane, preventing phantom key presses. and then the outer ring