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Repair information and guides for the iPhone 6 that was released on September 19, 2014. Model Numbers: A1549, A1586, and A1589

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Can changing a screen break the back light

I recently took my iphone6 into a local phone shop to have my screen repaired, it broke by dropping it.

That night I emailed them as after picking it up my screen would dim when pressing it in different places. A week after my screen went black (I could see it faintly with a torch light) ... They sent it off for back light repair... Which worked for a day !!! So I payed £80 for a new screen then £50 for the backlight ... But it's not worked so is there any way THEY BROKE THE BACK LIGHT??? When changing my screen?

Answer this question I have this problem too

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Sounds like whoever you got it from did a really bad job. Go with another company or even better, do it youself as its rather easy and its also good to know its been done right.

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Ask if they unplugged the battery before they started the repair, if they did not they probably damaged the motherboard. Try a different place and screen and get a refund. That was a scam.

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I have seen cheaper aftermarket replacement screens cause backlight issues.

Which can lead to damaged components in the backlight circuit on the motherboard.

From your description I am assuming the repair tech may have gotten a bad screen.

On some of the aftermarket screens the manufacturer does a poor job soldering the backlights flex cable to the displays flex cable(solder bridges for example) on the display itself or does not cover those solder joints properly with electrical tape and either one can cause a short in the backlight or its circuit on the motherboard.

My question is when they sent it off for a backlight repair did they say if they only replaced the backlight on the display assembly or did they replace components on the motherboard?

Well at this point I'm would recommend finding a tech who can troubleshoot and repair the backlight circuit on the motherboard as I bet there is a damaged filter or diode or another component that has failed in the backlight circuit.

I say this because I had to do this repair on an iPhone 6 months ago.

It was caused by a short from the backlight solder joints on the displays flex cable which caused a backlight filter on the motherboard to fry and die.

The customer's description of how the phone starting dimming if pressing the screen in certain spots and a week or two later there was no backlight at all sounds so similar to your experience.

I highly suggest you have the backlight circuit on the motherboard checked out as replacing the display or just the backlight may not fix the issue as the display only has the backlight on it and not its circuitry which is located on the motherboard.

Hope this makes sense and is useful for you.

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Good answer. Also loose screws at the upper part of the screen can contribute to this issue too.

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Thanks for the sincere comment Ben and also mentioning the possibility of loose screws being an issue. I had not considered that but will now since you brought it to my attention. Thanks again for the compliment and also all the helpful answers you have provided on this site.

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Nicole will be eternally grateful.
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