Apple iPhone 3G back light problem repair jumper

With article and troubleshooting guide solution for Apple iPhone 3G backlight fault. Backlight problem is the very common issue in this mobile phone. You can repair it here with these tricks and diagrams. It can help to find and fix this problem. 

When the backlight is faulted. The user could not see anything in the dark on their cell phone. To fix this issue. You need to read the full post for a better understanding.

Problem: No light, Blank LCD, Missing points. Missing LED current. Something is unknown. Solution: First confirm that led lights are working if there are no problem with LED lights, then make these jumper directly with jumper wire from one to another point on connector.

 Back-light problem repair ways

LCD back lights not working in Apple iPhone 3G screen is black and at light if screen display show us without lights. Some time this problem is created by burning, broken, missing LCD led lights. For missing, burning or broken led lights on LCD back side strip, please check and replace faulty led. Missing positive or negative points on LCD connector, pcb LCD connector or from motherboard LCD connector to lights controller stage (ic, bios switch) Make a jumper with jumper wire carefully
Check positive voltages on brown capacitor near the lights controller ice or black coil.
Positive volts directly come from the black coil and from the black coil to the fuse and light controller IC; the other point of LCD lights comes from negative and other black capacitor near the power ic red marked point.

Make jumper from LCD led lights to pcb positive and negative point carefully.

Here is the summary of steps to easily resolve back-light problems.

1. Try to clean first all PCB the dry it with hot air because it is old phone.
2. Be careful during cleaning. Avoid sensitive parts to touch or clean.
3. Test a red color line marked components pinpointed by testing meter for missing.
4. If you have, find any unlink pinpoints on the PCB. You may fix it by direct jumper.
5. If there is everything shows OK. That means you need to fix it in the display panel lights section.
   

To repair from the front display panel. You can test its missing or burning LED's. You can also test or clean its display connector. If problem has been resolved. Your iPhone is working fine. Please write your experience into the comments section here. But, if you can not solve your problem, then you can email me at shahidabbas2001@gmail.com. You can also subscribe to our news letter to get the latest and updated content into your mailbox. 

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