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This repair solution below may possibly help fix and repair a damaged Nokia N78 displays like white Lcd, blues Lcd, garbled, blank or black Lcd and some related display problems and failure.
Repair Hints: There are two Display filtering chips used in the circuit, if already tried and replaced those both filter IC you may then also rework or replace the Display IC marked with number 3.

Nokia 6085 6086 blue display 100% ok

Heres a solution that may possibly help fix and repair Nokia C3 display problem like white Lcd, blue Lcd, blank Lcd, garbled and saturated Lcd displays.
Note: this solution may only work and can be applied after ensuring that:
a) the Flash firmware is okay
b) the LCD Display module is okay or have tried replacing it with a new one

This solution below shows the display circuit  connection of Nokia C3 and its corresponding line connections including the pin connectors pin configuration.

Repair Tips:
1. Check the LCD pin connector, make sure it is free from dirt, oxidation and corrosion. Clean it and apply solder if the pins found a cold solder or broken.
2. Check the two voltage supply it is 1.8 and 2.8 DC volt(see solution above)
3. Check the connected two resistors near to the pin connector this two resistor has a value of 0 ohms and 100 ohms. replace if found damaged.
4. If all of the above components is okay, the last and hard enough to deal with  is reworking the JUNO chips. For beginners, you may  ask assistance to your Head Technician or Master Tech, working with JUNO IC  needs expertise, so apply extra precautions.

Heres the solution for Nokia N79 display problems such as blue Lcd, white Lcd, black or blank Lcd displays. This solution may help fix for the symptoms after ensuring that LCD Lcd module is working okay but the problem still exists.
The guide below shows the LCD display data signal line tracks from the display EMI filter IC to the corresponding LCD display B2B pin connector.



Repair hints: If the two Display EMI-ESD filter has been change but the problem remains. Do try to rework the display IC marked with number three. Just have the rework station heat controlled about below and not above 350 degrees and have an air flow of 3-5 range. Need extra care for that IC to work with.
P.S. this solution has been posted by special request.