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.
: Check the small resistors in series with the keypad lines. If one side shows a reading (GR) and the other doesn't, you can short the resistor to restore the signal. nokia 105 rm 908 keypad ways
Check the center point of the button for a GR reading. If there is no reading, the line is likely broken between the pad and the CPU. Jumper Solutions & Repairs If a series resistor is found to be
: Often caused by a break in the Red Power Key line. nokia 105 rm 908 keypad ways