Here's the Nokia 3720c solution for display backlight LED not working problem and shows a dark or black screen display. The solution below shows the connection line paths and certain components that holds for the LCD backlight LED to work.
Just refer to the solution below, this may help in solving backlight white LED problem on Nokia 3720 classic after you confirmed that the LCD screen is okay or already tried replacing it.
After already confirmed that the LCD is working, or already tried replacing it but still it shows a dark screen display and the backlight LED is not working, you may then check the highlighted components above. You may start cleaning the LCD pin connector, re-solder it if necessary.
Check the battery supply voltage(VBAT) across the inductor coil, check also the inductor coil for possible open circuit. Check/replace the 33 ohms resistor near the LED driver IC and the filter coil near the transistor.
You can also both check the LED+ and LED- voltages and trace each connection line paths from the pin connector down to the resistor and coil.
If seems that the LED+and LED- voltage reading is missing , you may then try to replace the LED driver IC.
Just refer to the solution below, this may help in solving backlight white LED problem on Nokia 3720 classic after you confirmed that the LCD screen is okay or already tried replacing it.
Nokia 3720 classic Display Light Jumper Ways
After already confirmed that the LCD is working, or already tried replacing it but still it shows a dark screen display and the backlight LED is not working, you may then check the highlighted components above. You may start cleaning the LCD pin connector, re-solder it if necessary.
Check the battery supply voltage(VBAT) across the inductor coil, check also the inductor coil for possible open circuit. Check/replace the 33 ohms resistor near the LED driver IC and the filter coil near the transistor.
You can also both check the LED+ and LED- voltages and trace each connection line paths from the pin connector down to the resistor and coil.
If seems that the LED+and LED- voltage reading is missing , you may then try to replace the LED driver IC.
0 comments "Nokia 3720 classic No LCD Display Light Jumper Ways Solution", Baca atau Masukkan Komentar
Post a Comment