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This solution covers for Nokia 6700 classic Backlight LED not working on the LCD screen display that result to a dark or black screen LCD display . You may first try to install a new LCD screen module before applying or using this solution below. Nokia 6700 classic LCD Screen Display No Backlight LED Solution If the LCD screen 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...

If ever encountered a nokia 6700 that always display insert SIM card on the display even trying inserting a good and working SIM card but still won't accept any SIM card, this solution may possibly fix the problem. Nokia 6700 classic insert SIM card problem solution Repair hints: a) Ensure that the SIM card socket, slot or holder pins are cleaned and free from dust and oxidation. b) Trace and check the VSIM voltage, it reads about 1.8 to 2.8 volts on components showed on the solution above. c) IF the SIM voltage is okay, you may need to remove and rework the GAZOO chip for further trouble shooting . Warning: handling the GAZOO chip may need extra expertise or you may end up  a dead phone. Don't touch it if no adequate knowledge about this chip.

Here's the solution for Nokia 6700 classic Ringer, hands free speaker no audio sound problem . This solution may help fix if the speaker is working okay and or already tried installed a new replacement spare speaker. Nokia 6700 classic Ringer, Hands Free Speaker Failure Solution If the ringer speaker is okay and the speaker terminal pads is already cleaned but still there is no sounds can be heard on it, you may need to check and or replace the components showed on the solution above. This components  were composed of a 0 ohms resistors and filter capacitors.