An lcd display modules will result to a blank or black screen display when an LED backlight failed to light up..
Here' the repair guide solutions to repair Nokia 5000,5000d LCD display backlight LED failure. This repair guide shows the particular locations of the components that might possibly damaged when the LCD display backlight LED will unable to light up.
An led driver ic located at the bottom side of the PCB board assembly which is driving the voltage and current to light the LCD display 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 3 (positive) and pin 6 (negative) of the LCD display interface connector.
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