Released on September 19, 2014, this 5.5" screen iPhone is the larger version of the iPhone 6.

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Red Screen/ Boot Loop

I recently bought an Iphone 6 Plus off of ebay. It was in two parts and I decided it was worth a punt as I've been fairly handy with replacing parts on a few other iphones I've gotten my hands on.

When it arrived the first thing I noticed was the inside looked pretty clean, there is no water damage, and all the connectors look like new. When I connected the Flex cables it turned on and immediately went into a bootloop. I tried putting it into recovery mode and all that, except it doesn't seem to respond and my computer won't detect it. I thought it might be the battery, as I have seen that can put the device into a bootloop. It now stays on a little longer, and seems to end up in a red screen.

From a little research this might be the proximity sensor. After a litle further looking around, there is a slight tear in the actual digitiser cable, or the flex cable closest to the North/Top of the phone.

My question is if anyone has any experience with this issue and whether a tear in the digitiser cable could cause a red screen? To be fair it looks like the whole lcd has had the glass replaced pretty poorly, or could be a cheap replacement.

Any help/advice is much appreciated!

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There can be several causes to boot looping. Remove the screen assembly and connect your device to iTunes. Does iTunes recognize your phone? You could also try a tool like 3uTool to put it or remove it from recovery mode. If that doesn't work, you can also disconnect the back camera to see if that helps.

If the phone works without the screen assembly, then gradually add the LCD and digitizer, then the front camera and then the sensor flex. This may help you in troubleshooting the device at a modular level.

You could have a logic board level issue as well but try these steps first and then come back and comment on my answer so that I get notified of your updates.

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