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Mobile Phone Light LED Problem and Solution – How to Solve Light or LED Fault in any Mobile Cell Phone

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 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 generally LED 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.

Mobile Cell Phone LED Light Connection

Mobile Cell Phone LED Light Connection

 

Types of Faults or Problems with Light or LED in any Mobile Cell Phone

Mobile Phone Light LED

Mobile Phone Light LED

  • No Light.
  • Light in only Keypad or Display.
  • Some lights not working.

Mobile Phone Light Problem and Solution – How to Solve Light Fault in any Mobile Cell Phone

  1. Check Light Settings.
  2. If settings are OK then Resold all LED.

    Mobile Phone Boosting Coil

    Mobile Phone Boosting Coil

  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. 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 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 or Change the Power IC.

Note:

Mobile Cell Phone Light IC

Mobile Cell Phone Light IC

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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By Santosh Das | Mobile Cell Phone Repairing

4 Comments

  • By luhiga, August 9, 2013 @ 1:46 pm

    Hallo

    Could assist me where can I buy a chinamobile phone diagrm/schematic

  • By Najib kiggundu, March 24, 2014 @ 12:46 pm

    thanks for all those updates

  • By Anand, July 6, 2014 @ 3:20 pm

    Nice

  • By Lucky, August 6, 2014 @ 2:19 pm

    Dear
    I have a micromax tab p650. The battery current backflows to charger when connected. The charger LED glows even thpugh the charger supply is off. Please advice a remedy. Also advice on what if the problem is not attended !
    Thanks!

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Mobile Cell Phone Repairing | Mobile Phone Repair Guide, Help, Tips, Pictures, Videos, Hardware, Software Solution Mobile Phone Repairing | How to Repair any Mobile Cell Phone including Nokia, Samsung, Motorola, China Mobile Phones, Sony Ericsson, LG, HTC, Apple iPhone, Blackberry, MyPhone and all other Mobile Phone. Includes Mobile Cell Phone Repairing Photos and Diagrams, Repairing and Service Tips, Tricks and Solution for Problems like – Speaker or Earpiece, Headphone, Mic or Microphone, Signal Problems like No Network, Charging Problem or Mobile Phone Not Charging, Motor or Vibrator, Ringer or Buzzer, Camera, Display, Screen, PDA, LCD, Power Button, Bluetooth, Infrared, Antina or Antenna Switch, Hand Free , Key Pad Not Working, Joy Stick Fault, Insert SIN or No SIM, Light Problem, No Power or Set Dead. Also included is How to Load Software (Flashing) to any Mobile Phone and Other Hardware and Software Problems and Solution.

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