Why is the backlight on my iPhone not working?

Question

iPhone 3GS

Обновленная версия iPhone 3G с более высокой скоростью обработки. Ремонт этого устройства схож с iPhone 3G, и требует простых отверток и инструментов для вскрытия. Модель A1303; 16 или 32 ГБ памяти; с Черной или Белой задней пластиковой крышкой.

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Lou @lou3474

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Опубликовано: 9 апр 2011 г.

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Why is the backlight on my iPhone not working?

I dont remember doing anything to my iphone to cause the backlight to go out. I havent got it wet, or dropped it. I have and iPhone 3gs 16 GB white case. i was playing a game on it, in my house, and then 5 minutes later, i went to check my email, and the backlight didnt work.

I can still see the screen if i shine a light across it. and everythig alse still works. I have tried setting the brightness haighter and lower, but that doesnt do anything.

what do I need to do to fix the backlight? If i need to buy materials what do i need? Ive never taken apart an electronic device before but im ready to give it a try if I can fix my phone.

Your help would be greatly appreciated.

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I have an Samsung galaxy s 4. It is charging and the alarm on my phone to wake me up still works. However, I'm not able to get any light on the screen. Why is this happening and what can I do to solve it?

21 фев 2018 г. из Bob

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oldturkey03 @oldturkey03

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Опубликовано: 9 апр 2011 г.

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Lou, disassemble your iphone with the instructions on here Take your time and familiarize yourself with the instructions first. Read the comments and the notes and make sure you understand the instructions. Once you have it disassembled take a look at the attached image and identify the coil and the area around the coil and clean it very good with isopropyl alcohol and a soft brush. Check for corrosion and debris etc. It may resolve the issue or you may have to replace/fix the coil. Let us know how it is going so we can continue to assist you if needed. Just take your time and find an area with good light and you will be fine. We are all here to help you.

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I have an Samsung galaxy s 4. It is charging and the alarm on my phone to wake me up still works. However, I'm not able to get any light on the screen. Why is this happening and what can I do to solve it? — Bob

iRepairtinker1 @irepairtinker1 Репутация: 289 2 1 · Answer 1 · 2014-08-04T23:35:53-07:00

Hi, the coil to which oldturkey3 refers to is marked 6R8 and has blown and needs to be replaced.

There is a way round it by soldering a cable from the position in my photo to the screen connector on the logic board therefore cutting out the coil. I used +- .5mm insulated cable recycled from a cable from a old laptop screen.

Im sure you can find a technician that can do the job, if they cant do this simple bit of soldering then heaven help us.

Why dont you have a go yourself, beginners luck is a strange thing, you will most likley get it right the very first time and then screw up every other soldering job you attempt for a month but luckily you only need to get it right once unless of course you are going to join the iFix community then sadly once you are hooked its a life of racking your brains for solutions that could be solved by just going out and buying a new one but that community is called iPrix.

Good luck

iPhone 3GS

Why is the backlight on my iPhone not working?

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