MOBILE PHONE LIGHT LED PROBLEM & SOLUTION

Mobile Phone Light LED Problem and Solution
This chapter explains Mobile Phone Light or LED Problem and Solution – How to Solve Light or LED Fault in any Mobile Cell Phone. These problem and solution apply to all brands and make of mobile phones (Feature Phone and Android Smartphone) including Nokia, Samsung, iPhone, China Mobile Phones, Motorola, HTC, Sony, Blackberry, Alcatel, Apple, AudioVox, Benefone, Danger, FIC, Hagenuk, Palm, Kyocera, LG, Panasonic, Huawei, ZTE, Spice, Lava, Sony Ericsson, Micromax etc.


What is LED in a Mobile Cell Phone?

LED in any mobile cell phone is an electronic component or Part that generates light in the Mobile Phone. These are generallyLED or Light Emitting Diode. There are 2 types of connection in the Light Section of a Mobile phone: (i) Series Connection; and (ii) Parallel Connection.
Types of Mobile Phone Light LED Problem
  • No Light al all.
  • Light in only Keypad or Display.
  • Some lights not working.
  • Backlight Not Working

Mobile Phone Light LED Problem and Solution – How to Solve Light LED Not Working Fault in any Mobile Cell Phone


Mobile phone boosting coil
  1. Check Light Settings.
  2. If settings are OK then Resold all LED.
  3.  If the problem is not solved then change the display or the screen and check.
  4. If the problem is not solved the check all the LEDs using a multimeter. Keep the multimeter on Buzzer mode and Check LED. If LED is Good then it will Glow. If LED is Faulty then it will Not Glow.
  5. Change LED or Jumper if required.
  6. If the problem is not solved then Check Track of the Light Section of the PCB of the Mobile Phone and Jumper if Required.
  7. If the problem is not solved the Check the SMD Boosting coil and Change if Required.
  8. If the problem is not solved the Heat or Change the Light IC.
  9. If the problem is still not solved the Heat, Reball (BGA) or Change the Power IC.

    10. Notes:

    In all Nokia Mobile Phones, there are 2 Types of Light IC:

    1. Ball-Type Light IC: Beside the Boosting Coil, There is a Small-Sized Ball-Type IC. When this IC is Desoldered, There are 8 Ball Underneath. This is the Light IC.
    2. Leg-Type Light IC: Beside the Boosting Coil, There is a Small-Sized, 4+4 = 8-Leg-Type IC. This is Light IC.
    3. Light IC = Back Light + Display Light

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