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LCD contact problem

I dissambled my HTC Evo 3D because my display is not working correctly,the screen goes black randomly and if I press hard the left corner where is the home soft button the screen is working again.The trouble is with the conector between the motherboard and LCD diplay.I don't know how to reach this because my touchscreen is work perfectly and i don't want to remove it and melt the glue.is other way to reach it from the other side?.my question is how to fix it,I need a new display or I can change only the conector?
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the contact problem is where the conector connects to the diplay

http://www.youtube.com/watch?v=o56O0_xIv6c try to open it up and clean the connector and put it back

Dark smudge keeps appearing on my photos. Not sure if hardware or software problem.

I have a LG G4 (H185). Yesterday, I was taking photos and I noticed this annoying smudge on every photo I had taken. It is, of course, easier to see in brighter photos. I'm quite certain this is a hardware issue and I think I can see a very small scratch on the glass window in front of the back lens. I'm not sure if this could be causing the smudge, so I want to be 100% sure this is not a software issue before I go a buy something and start taking my phone apart. Could there by a bug or something similar causing this smudge? Or is it almost definitely a hardware issue, like a scratch?
Thanks
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Technical - Led light behind touchscreen Mi4C

Greetings forum and hello to all.
I recently changed the touchscreen of my Mi4C in a service center and wasn't very happy with the result. I don't think it's the original Xiaomi touchscreen but they claim it is, so I'm wondering what to do next.
Main issue is that the white LED light behind the buttons at the bottom of the touchscreen doesn't work anymore, and they say there is no way to fix this.
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My opinion is that they perhaps missed this piece behind the buttons, that probably reflects the LED light somehow:
Does any of you have experience with this part of the phone and can give me a more professional opinion?
Thanks a lot.

Position of GPS sensor?

Hi guys,
I have a Sony Z1 and love to use it for navigation @hiking. Well I decided to replace it with a Mate 9. But I need to know the GPS sensors position. On my Z1 it is on the ears side, top left. I have found a technical paper on the Sony side somewhere.
Any such knowledge for the m9?
Tia! best regards, Michael

For sure on the top half of the phone.
according to this, it's on the when looking at the front of the phone. The GPS seems to be the BCM4774 chip (see link under)
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https://www.broadcom.com/products/wireless/gnss-gps-socs/bcm4774/
and to give you an idea, here's the phone opened (you see there the other side of the motherboard). I'd say the GPS is 2cm from the top of the phone

I need your help with my SM-N960U

Hello, I’m suddenly experiencing an issue with the light system of my phone.
The screen light is going low and sometimes turns itself yellow. It’s usually come while using the phone, with the lines that blur the vision.
Here’s the fact: when I take a screenshot with the SM-N960U and share it on another phone, it appears very clear, as you can see in the pic below.
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I have taken a screen picture simultaneously with another phone to show you what’s actually going on in my SM. Please see the pic here:
Can anyone help, please?
Thank you.