2600 No light on LCD solution

As a beginner in repairing cellphone it will took you a lot of time to figure out 2600 no light problem.  This post will guide how to repair it in no time.

I will provide here pictures search by me in the internet.

Picture 1.

Picture 2.

From the picture above you have to trace picture 2 in the schematic diagram (picture 1).

In this case I found out the I have an open line in Vled -  .   I use a jumper wire and connect it to the backlight referring the schematic diagram.

Back to:  Cellphone repair tutorial - problems and solutions

6020 intermittent signal - dropping signal

History:  This unit was brought to me by my customer.

Diagnostic:

1.  After I disassemble the unit I found out the board is already repaired.  The PCB board is full of flux and messy.  Signal is dropping after I power on the unit.  This symptons is usually a problem in the TX circuit.  You can verify it by doing a manual search in the settings of your cellphone.  If you could search all the service provider then TX is the problem.

2.  I usually replace P.A. in this common problem.

Solution:  Replace P.A.  After replacing the amplifier the unit is working again.  see the picture below.

Just replace P.A. part number N7700.  Problem will be solved.

Back to:  Cellphone repair problem and solutions

1600 no LCD light solution

Problem:  1600 no light on display causing very dim LCD.

Solution:

Check for Vbat if there is a supply voltage (see the image below).  If there is no voltage make a jumper connection from Vbat to the inductor from the picture provided below.

There is another solution but in this case this is the solution.  Just in case there is a supply voltage and still there is no light in the LCD you may replace N2400 LCD driver IC.

Back to:  Cellphone repair solution

7100s Phone repair guide

These are solutions for 7100s problems. These solutions solved all the basic problems in your endeavor in repairing 7100s. This is a must have 7100s phone repair guide

Solutions in this phone repair guide includes:

1. bluetooth IC
2. camera solution
3. charging ways
4. keypad
5. localmode testmode
6. mic
7. ringer
8. Sim

Download here: 7100super solutions

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Nokia 1100 hardware repair guide

Nokia 1100 hardware pictures repair guide

 

Nokia 1100 PCB Lay Out
Nokia 1100 Antenna Switch Modding
Nokia 1100 Shorted Board Test spots
Nokia 1100 Hands Free Solution
Nokia 1100 Insert Sim / No Sim Card Repair Solution
Nokia 1100 Sim Card Connection Line Paths
Nokia 1100 Sim Filter IC ways
Nokia 1100 Local Mode / Test Mode Solution
Nokia 1100 Local Mode / Test Mode Repair
Nokia 1100 Microphone / mouthpiece failure solution
Nokia 1100 to 1100b convertion
Nokia 1100 Blank LCD screen Display solution
Nokia 1100 Not Charging Solution 1
Nokia 1100 Not Charging Solution 2
Nokia 1100 Not Charging Solution 3
Nokia 1100 Not Charging Solution 4
Nokia 1100 buzzer / ringer solution
Nokia 1100 No network / low signal reception repair solution
Nokia 1100 Earpiece speaker repair solution

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