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This solution covers for Nokia 6700 classic Backlight LED not working on the LCD Lcd display that result to a dark or black Lcd LCD display.
You may first try to install a new LCD Lcd module before applying or using this solution below.If the LCD Lcd is already tried installing a new one but still the backlight LED still not working or unable to light up. You may then need to trace, check and or replace the components showed on the solution above.
There is a BVAT voltage line that supplies to the LED driver IC and you can check this voltage about 3.7 volts which is came from the battery  positive terminal. and came way across to the two filter coils before it feeds in to the LED driver IC.

If the the voltage supply line is okay, remove the LED driver IC and trace each corresponding solder ball terminal line paths through to the pin connector and VBAT voltage line filter coils.
Rework and clean the solder ball terminal pads.
Replace the LED driver chip if the problem unsolved.

Nokia 2320 Classic Bluetooth is used for data transfer between devices with Bluetooth.In Nokia 2320 Classic Bluetooth can be damage or not working due to water damages and rust.It can be fault for shortage and burned parts  Nokia 2320 Classic Insert sim problem solution ways jumper In above diagram you can see some parts that are in lined with red color. Clean these parts after disassemble with electronics cleaner and then apply some hot air so that it can be dry.Do not apply much air with hot air station because it can harm your skin or may can damage the mother board of Nokia 2320 Classic.
These parts are also used in FM function so if FM Radio is not working in Nokia 2320 Classic you can also re flow and resold these parts that are identify in the above diagram. 

f you are facing Auto restart problem in Nokia 2323 Classic it can be solve with a few simple steps that are given bellow in this post.A diagram to solve Restart problem in Nokia 2323 is also given bellow.Nokia Asha 311 Mic Problem Jumpers Ways Solution

As In above diagram you can see a red line jumper.If you have restart problem in Nokia 2323 Classic make jumper as shown in above repairing diagram.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update cellphone service diagrams timely with new cellphone diagrams.some related post are also given bellow you can read them also for more information about cellphone.