Boot loop with red screen and won't enter Recovery nor DFU mode

Question

iPhone 5s

L'Apple iPhone 5s è stato presentato il 10 settembre 2013. La riparazione di questo dispositivo è simile a quella dei modelli precedenti e richiede cacciaviti e strumenti di apertura. Disponibile nelle versioni GSM o CDMA con capacità di 16 , 32 o 64 GB nei colori Argento, Oro e Grigio Siderale.

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Caleb @lrt

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Postato: 19 ago 2017

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Boot loop with red screen and won't enter Recovery nor DFU mode

I have been given an iPhone 5s to try and repair that boot loops. When you hold down the home and power buttons together the screen goes red before shutting off. The screen had a crack in the top left corner, so I bought a non working 5s off eBay to use as a parts donor. However, even with the new screen fitted, (with screws in correct positions) the phone still boot loops as before. I cannot get it into recovery nor DFU mode to be able to reflash it with the 3U Tools program.

I presume this has suffered a NAND failure when it was dropped?

None of the water indicators have activated and the interior of the phone is in excellent condition.

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Ohhh, yeah, maybe most people have these stupid problem....

19 ago 2017 da miriamgreen

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Soluzione Prescelta

Ben @benjamen50

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Mtwo Perform

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Postato: 19 ago 2017

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Have you tried unplugging the front camera ribbon cable from the logic board and see if it boots?

A faulty front camera assembly can cause red screen of death bootloop.

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Thanks. No I haven't tried that, I'll have a go when I get the chance.

However I did swap the whole display over except for the home button. It could still be faulty though.

19 ago 2017 da Caleb

I disconnected the front camera ribbon cable and tried restarting it. It didn't make any difference. So I tried the unbroken screen. It also keeps looping with a red screen but only half the display lights up with flickering bars.

So I decided to try swapping the battery over to the donor phone to see if I could get it to work. Although it's passcode locked, both screens work perfectly and the phone boots up normally without any red screen. Seems as though this phone has a problem elsewhere.

20 ago 2017 da Caleb

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Thanks. No I haven't tried that, I'll have a go when I get the chance.

However I did swap the whole display over except for the home button. It could still be faulty though. — Caleb
I disconnected the front camera ribbon cable and tried restarting it. It didn't make any difference. So I tried the unbroken screen. It also keeps looping with a red screen but only half the display lights up with flickering bars.

So I decided to try swapping the battery over to the donor phone to see if I could get it to work. Although it's passcode locked, both screens work perfectly and the phone boots up normally without any red screen. Seems as though this phone has a problem elsewhere. — Caleb

iPhone 5s

Boot loop with red screen and won't enter Recovery nor DFU mode

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