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Huawei's 2016 flagship smartphone. Features a unibody case and dual rear-camera setup developed in partnership with Leica. Comes in 32/64 GB storage options and six different finishes. Model numbers EVA-L29, EVA-L19, and EVA-L09.

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Backlight won't work after screen replacement

Good evening everyone,

I'm currently writing this because I haven't found anyone that has the same issue as I have. Briefly, I cracked my P9's display 2 months ago and since nobody fixes Huawei's products where I live, I decided to fix it myself by buying a new display on the internet.

At first, I didn't recognise that the display I recived wasn't the right one, the cable was black so it was supposed to be for the Lite version of P9 (great sellers...). As soon as I connected anything I turned it on but I could see pretty much nothing. Then I finally realized it was not compatible with my phone, then I ordered a new brand one once again, this time from another seller though. I was so happy that I could finally fix it and be sure it was going to be compatible (in fact it is compatible): same problem, I can hear every single sound, everything works but the display doesn't show up.

Now, I can see the screen with a lamp on it and the touch works perfectly, so surely the problem is the backlight that doesn't turn on at all.

Is it possible that I broke something on the mobo or the display that wasn't compatible messed up the display connector? I'm not trying to buy a new display because I'm mad at this and I won't waste a single penny on it furthermore.

Thank you in advance.

P.S. The displays are both Huawei original brand.

Yanıtlandı! View the answer Ben de bu sorunu yaşıyorum

Bu iyi bir soru mu?

Puan 4

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i have same problem

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I'm surprised people are blowing up backlight circuits for Huawei P9 screen replacement. Did you guys forget to unplug the battery first?

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Puan 4

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Actually I don't remember what I unplugged first, it could be that I unplugged the screen contact first, yes.

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Hi, have the same problem, I think the backlight diode is not working but I don't know when is it placed on the mobo and how to replace. There is many issue on iPhone 6 but nothing on any Huawei

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Puan 2

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Hello do you know what the diode?

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Try this solution and say thanks to the good man

http://forum.gsmhosting.com/vbb/f846/hua...

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Puan 2

Yorumlar:

How do you short something?

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Grand merci a vous les amis, ce poste m'a été d'un grand secoure.

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Hello, i did everything like they said it in the forum, but the backlight still stays off. I'm not quite sure why, because everthing else works fine. Any ideas - Thank you.

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Has anyone already found a solution? I think I screwed up the backlight circuit indeed. I did see the post on the jumper for a p9 lite.. but haven't found a similar diagram for the p9.

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Puan 1

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Same problem here, I can't find the similar diagram for mine P9.

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So I had the same issue, I was able to fix it by following something i found on a forum that was mentioned here. See this diagram

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Puan 1

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Nice! Could you also post a link to the post where you found image? I need to know the second spot on the motherboard for the jumper. Or even better, how did you fix it?

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http://forum.gsmhosting.com/vbb/f846/hua...

I took it to a shop because I can't do the smd soldering myself. I think i paid €25.

I removed the motherboard and gave it to them so all they had to do was place the jumper. It worked so i'm happy.

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any solution?? I have the same problem, my screen broke and I changed it by a new one that worked for an hour, but after that the screen turned off but operating system is still turned on, I have tried 2 screens and nothing, what is the problem??

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Puan 0
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Also looking for a solution to this. Unplugged battery as always before changing screen. 2 screens no backlight. Anyone know where the backlight diode is?

Bu yanıt yardımcı oldu mu?

Puan 0

Yorumlar:

Try this solution and say thanks to the good man

http://forum.gsmhosting.com/vbb/f846/hua...

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I have probably the same problem. I have changed two LCDs the backlight I think isn't working correct because the lightning did not increase at all and some times the screen is flickering. I have changed and the battery but nothing. Any thoughts?

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Puan 0
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Hi

Try this solution

https://ibb.co/dBuiQ8

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Puan 0

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This solution has already been givven 2 times on this thread. Why post it another time?

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I have the same problem the diagram given before is different than for Huawei P9 EVA-L09

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Puan 0

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does anyone have a diagram for a huawei x1? i blew the backlight and cant find any info what needs to be jumpered

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The solution here aren't for p9, I'm still finding it difficult to rectify this problem.

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Puan 0

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I still find it difficult to rectify this problem

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They are for the P9, why would you say they are not?

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Huwaei P9 Lite 2017 Pra-Lx1 backlight solution?

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Puan 0
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for p8 lite 2017? solution?

thanks

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Puan 0
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