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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.

This solution may work and can be applied if Nokia 7230 does not detected if being plug-in to a personal computer. This solution shows the particular components that needs to check or replace if the device handset is not detected over the USB.Check all the components showed on the solution above it is labeled according were to begin with.

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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. 

Nokia 5230 is dead and not getting power on it can be problem of Nokia 5230 power switch button ways solution Nokia 5230 power key not working.So to diagnostic this fault plug in charging pin into it if charging symbol shows on it but can not be switch on button is not working.



to solve power switch button power key in Nokia 5230 you can follow steps as given in above diagram.check power button prints points with meter if value is good then replace power switch button in Nokia 5230 if value is not good then check all track which is given in red lines.red line print is to show positive print and other one is a ground print.

Heres a step by step procedure on how to fix or repair a damaged nokia 6700 slide that has a navigation key and upper keys that stop working or not responding when being pressed. This solution may also help work if the device show charging indication but unable to turned  the Power ON.
If encountered this problem the solution below will tell us which particular parts or components that might damaged and caused the problem.

In Nokia 6700 slide the upper keys like the soft left, soft right, up, down, select, right, left, send, menu, S60 and the power ON OFF key is mounted or connected on a flexible cable wire.
This solution below shows the upper keys connection with each other  keys.

Aside from keypad button connection, there also other major operational circuit is being connected to it like the LCD display, microphone, earpiece and camera.
Once the flexible cable wire damaged or breakdown all of these connected circuit will show some difficulty and problem.

In troubleshooting  the upper keypad problem, you must first ensure to check the flex cable wire or try to install a new replacement spare if having trouble how to determine if it is already damaged or not.
A damaged flex can be checked visually for looking some cuts or brushes but sometimes not so easy to determine.
Now if the flex cable wire is already been replaced but still does not solved and fix the problem, you can proceed  and see this soltion below for further troubleshooting.

Now, this solution shows the location of the two ESD-EMI filter used on nokia 6700 slide keypad circuit.
This filter ICs also holds the numeric keys, if one or both of these keypad filter IC is damaged this will result to keypad not responding problem.
By replacing this keypad filter ICs will possibly help fix and solved Nokia 6700 slide keypad malfunction problem.

If Nokia C1-01 is not getting power On and it can make charging. It is 100% fault of on off button in it.because On Off button on keypad is not working so that it will not be able to power On.Nokia Asha 300 insert SIM Problem Solution ways jumpers

Nokia C1-01 power button On Off switch not working ways jumpers.Replace battery and check if mobile can not be switch On dis assemble the phone and check power switch button ways as given in above diagram.If any print out of these is missing apply jumpers to solve On Off Button problem in Nokia C1-01 .
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.

Charger not supported occurs if the battery temperature resistor is being damaged, This solution shows the exact location of this said chip resistor on the main PCB board. This chip resistor needs to replace if a charger not supported will show on the LCD display screen during when a battery charger is being plug-in. 

The value of this said chip resistor is 47K, you may find a replacement on it any non working old nokia PCB board.

If you are facing mic problem low voice or not voice out going to destination then this diagram will help you to solve mice problem in nokia asha 303. In diagram bellw you can see a mic that is defined with red boarder and some parts are also defined with red line boarder.All cellular mobile repair solution here Nokia 2320 Classic Ringer Problem Jumper Ways Solution
So we have to check all these parts that are in red board to solve mic problem and mic not working problem in nokia asha 300.check mother board vary carefully if there is any rust carbon or water damage issue. Clean mother board form these areas and apply some heat with hot air so that mother board of nokia asha 303 can be dry.
If with only service it can not be solved change mic and you can remove mic with hot air or solding iron. In nokia asha 300 mic has 4 points itself and one is ground other are data clock points. so we can apply jumpers in these point.
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.

 
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