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Nokia C2-03 LCD Back Light LED Problem Solution

Okay, due to some folks requesting this solution, here comes the Nokia C2-03 LCD screen display backlight LED problem solution.  We already have the keypad light solution posted here, so this gonna be a continuation of the white backlight LED troubleshooting for Nokia C2-03. This will also work on C2-06 and C2-08 a dual SIM card slider phone.

Since Nokia C2-03 is a slider phone and used a UI flex (flexible ribbon cable), that is use to connect the LCD screen display from the main PCB board. Now in fixing backlight problem on the display, we must always consider that the flex is vulnerable and may cause the problem.

Here' how to troubleshoot the Nokia C2-03 backlight LED problem:
For quick fix, on minor problem like if the phone status shows no indication of being wet by any liquid, free of oxidation build up or the PCB board is still clean.
- Check the Flex ribbon cable wire.. replace if damaged.
- Check/ try to replace the LCD screen, the white LED's on it may already been busted. 

This figure shows the connection line paths of the backlight LED's on Nokia C2-03 UI flex cable. There are two white LED's also mounted on both sides of the top part of the flex.  This two LED's were also connected to the inner backlight LED's of the LCD screen.
Take note: the LCD's backlight  is also connected in parallel circuit like the two LED's on the flex - meaning if that two LED's was still able to light up but not on the LCD, it means that the LCD's backlight LED is already busted. So check that out...