A repair guide solutions covers to repair Nokia 5000,5000d keypad backlight LED problem.
This repair guide shows the particular locations of the components that might possibly damaged when the Keypad backlight LED failed to light up.
The LED driver ic is mounted near at the bottom side of the PCB board assembly. This chip drive and sustain the voltage and current to light the keypad backlight LED's, if the supply voltage feeds from the cell phone battery is cut or missing this chip will unable to function.
The the output voltage of the led driver IC is connected to pin 12 (positive) and pin 13 (negative) of the keypad interface
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