Here's the solution for Nokia 6730 classic LCD Display LED back light problem that shows a dark screen display due to the LED's failure to light up at the back of the LCD screen display module.
If encountered and try to fix this kind of problem on the device, you may first try to replace the LCD module, just to easily determine if the LED's at back of it is already been damaged or not.
If seems after installing a new LCD but still the LCD shows a dark screen display, refer to the solution below and locate those certain components for check up and for tracing the LED's connection line paths.
Locate all the components showed on the solution above, and then check and replace if found damaged. The filter coil is connected to the battery positive supply voltage of 3.7 volts, if this voltage is missing just mend to reconnect it through to the battery's B+ terminal.
You may then trace each of the LED's connection line paths from the LCD pin connector down to where it is being connected in a certain components such as the capacitors.
Since only the LED's positive supply voltage have a ideal spots where you can check where it is being connected, you may start on that track.
The LED's negative supply voltage is connected directly to the GAZOO chip, so there's no way out that you can check its connection down to the solder ball of the chip.
You may only need to rework the GAZOO chip if the LED's positive supply is working okay and if the problem still exists.
If encountered and try to fix this kind of problem on the device, you may first try to replace the LCD module, just to easily determine if the LED's at back of it is already been damaged or not.
If seems after installing a new LCD but still the LCD shows a dark screen display, refer to the solution below and locate those certain components for check up and for tracing the LED's connection line paths.
Nokia 6730c LCD Display Backlight Solution
You may then trace each of the LED's connection line paths from the LCD pin connector down to where it is being connected in a certain components such as the capacitors.
Since only the LED's positive supply voltage have a ideal spots where you can check where it is being connected, you may start on that track.
The LED's negative supply voltage is connected directly to the GAZOO chip, so there's no way out that you can check its connection down to the solder ball of the chip.
You may only need to rework the GAZOO chip if the LED's positive supply is working okay and if the problem still exists.
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