I have been having this same issue for over a month ago and even after surfing online for the solution and trying them(changing battery, hard reset including all the solutions here) nothing worked. Yesterday while checking up fixes on YouTube I saw a recent video on how to fix this issue and it actually worked for me. It even teaches how to fix iPhone touch pad issues. Hope it works for others too...... video link:
//youtu.be/lQbAd8Ws5Ek
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You were searching youtube for fixes and found your own video? rofl. nice try to get views
Oct 5, 2018 by Tam il
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Cancel Post commentPosted: May 29, 2017
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What you did on your phone is a liitle bit dangerous for it .Removing the Lcd or the flex cables withour removing your battery may cause shortage to the board luckily on your case its not damage or what .Always remember remove the battery first before anything else .regarding to not using proper or lacking of tools in opening the phone may result of damage to the board so keep that in mind.
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True remember. The video said to go search on how to open up your iPhone before completing the video. As a precaution. Also said she had no experience on opening phone and had less materials too
May 29, 2017 by Toyo Akoms
Ironically when unplugging or plugging in screen cables while a power source is connected to the phone (especially battery) can end up short circuiting the chip that controls power to both the rear camera and the front camera as the connector of the screen cables itself can accidentally touch something it should not on the logic board.
May 29, 2017 by Ben
Video wasn't too elaborate anyway but it helped fix mine
May 29, 2017 by Toyo Akoms
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Cancel Post commentPosted: Aug 12, 2017
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Back Camera and LED/Flash not working, Wifi is extremely weak. When I open the camera app, front camera works fine but when I switch to the back camera the display goes black. In the top left corner it shows the following message, "Flash is Disabled - The iPhone needs to cool down before you can use the flash."
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I had these issues too. Go check this //youtu.be/lQbAd8Ws5Ek to fix it. I hope it works for you
Aug 12, 2017 by Toyo Akoms
Similar problem. Bought replacement camera (under £3) but when dismantling camera I noticed a loose connector, (one of the 3 you need to dis to remove screen) Refitted properly and ensured the little plate was seated correctly. Phone now works properly.
May 14, 2018 by rogerrose59
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Cancel Post commentPosted: May 14, 2018
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Okay so this issue can happen from a loose rear camera connection to logic board.
If you do not have the metal plate that covers the screen and rear camera connectors on the board the cable for rear camera can easily become loose on unplug so check for that and reseat as needed.
Had clients come in for that before.
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Cancel Post commentPosted: Dec 14, 2018
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loose camera flat connector
open the phone, check the connector of camera and logic board.
everything is fixed
flash and back camera is ok right now
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Cancel Post commentPosted: Nov 11, 2017
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Guys , I have I phone 7 plus . The same problem happend to me when I drop the phone in the floor . I been trying online solutions for about one month . No use . I even go to the repair store and check the cable connection, if there was some loss . No result . I live in Ethiopia there is no Apple store .
When someone contact me to buy I cloud closed iPhone 7 Plus , I took the risk and buy it . I replace the camera with from the I cloud closed iPhone . My phone now works perfectly.
In my suggestion, am nat an expert on hardware , the cameras may be sensitive and can be damaged easily.