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SE W200-K310-K320 LCD no displays and no Light Solution

                   SE W200-K310-K320 LCD fix

SE W200-K310-K320 LCD jumper
Learn more for fix : Nokia 2690 Display Light Problem Solution
Here's the Nokia 2690 hardware solution for  LCD display light problem. This problem may result to show a dark or black screen display for there is no illuminating backlight LED on the back of the LCD screen.

To fix the dark screen display problem, you may first try to replace or install a new LCD screen module, to easily confirm if the LCD's backlight LEDs were still working or already damaged.
You can also check the LED's using the multimeter if you can manage without damaging the LCD flex connector. 
If the newly installed LCD still shows the same problem and the LED light doesn't light up, refer to the solution below and locate the highlighted components on the PCB board.

Nokia 2690 Display Light Jumper Ways
nokia 2690 Display light Jumper Ways tracks

Check the filter resistors and capacitors connected to positive and negative supply voltage of the LED pins.
Trace also each connection line paths were it is being connected to a certain components such as the resistors. Check and replace also the chip transistors.
If  both  keypad LED isn't working also, check the VBAT battery voltage on the filter coil and check also the coil for possible damaged. If the voltage reading is okay, replace the LED driver IC, for it also control the supply voltage both on LCD and Keypad Light LED.

More ways to fix :  Nokia 5130 keypad solution, keys and switches connection tracing guide for repair
Here's the Nokia 5130 complete keypad solution, this solution shows each certain keypad key connections including the button switches such as the volume up and volume down control buttons and also the MP3 player button switches such as the Start/stop, forward and rewind button switches.

The solution may help repair and fix nokia 5130 keypad malfunction and button switches failure. You may check, trace particular keys which are not able to function by using the repair guide below. Each group of colors indicates that they are connected with each other. So just locate where that particular non working key being connected and mend it found cut or open.

Nokia 5130 xpressmusic keypad keys malfunction full tracing solution
nokia 5130 keypad key jumper ways full tracks

The Power ON/OFF key is isolated and not connected to other group of key connection for it only holds for switching or powering up the device. There is an open spots near the keypad filter IC that the power ON and OFF key can be connected when the power key fails or or if the line is cut or open.

Nokia 5130 ON-OFF power key jumper ways 
nokia 5130 power on and off jumper ways

And here's the internal connection of the keypad filter IC, you may check and apply a temporary jumper on this components to ensure that the inner line paths from the application processor is not being damaged.

Nokia 5130 keypad filter IC jumper ways 
nokia 5139 keypad filter Ic jumper ways

SE W200-K310-K320 LCD no displays and no Light Solution Rating: 4.9 Written by: Unknown