I bought an iPhone off eBay germany. It always gives the same restore error in iTunes :

"The iPhone [iPhone] could not be restored. An unknown error occurred [error 50]."

Anyone got a idea how to get the iPhone to work? I've tried 2 different computers with firewall off, different USB ports, different cables but keep getting this error at around 65% of the restore process.

I've tried restoring in the DFU mode too, still the same error pops up. I read somewhere it might be the Baseband IC which needs to be replaced. Would replacing the Qualcomm MDM9615M help?

Anyone who has had the same issue or knows about it? Kinldy help me out of this.

Haris

⟐ Commented Ocak 19, 2021 at 6:45 GMT-7

⟐ Answered Şubat 08, 2020 at 11:47 GMT-7

⟐ Commented Şubat 03, 2021 at 19:31 GMT-7

Anyone got any idea how to fix that?

⟐ Commented Mayıs 21, 2026 at 14:50 GMT-7

⟐ Commented Ocak 15, 2021 at 2:31 GMT-7

⟐ Commented Aralık 05, 2024 at 3:45 GMT-7

I have replaced the loudspeaker on an IPhone 5s...

The phone worked well before, the only problem was no sound.

Now it wont boot into IOS.. When i press the on/off button, it shows apple logo for 1 sec, and then screen goes black. But i can see that there are light in the screen (on the side when its not assempled),

If i try to start it by holding the on/off button, it shows the logo for 5-6 seconds and then goes black.

I have tried to go to recovery mode (or what it is called), but it wont let me.

Now i have replaced the bottom cable, with jack, charger and microphone on... Still nothing happens..

I have tried to connect a broken screen, but also with the same result.

The only thing i now believe it could be, is the battery. The first time i changed the part, i took the battery out. And when i was trying to boot the Iphone, i said that there was no power on, but the phone was fulle charged before i started.

Could it be a damaged battery??

Or is there someone that have an idea of what else could be wrong???

⟐ Commented Eylül 11, 2025 at 1:19 GMT-7

Thanks a lot guys.

⟐ Commented Ekim 06, 2019 at 23:55 GMT-7

After I replaced the LCD digitizer on an iPhone 5s, it has gone into an infinite boot loop:

1. You can see the Apple logo for about 1 min.

2. The LCD turns bluish.

3. Restarts and does the same thing again.

4. After the second time, the phone turns it self off, and it is no longer possible to turn it on again. If I remove the battery, and then up it back in, the same thing happens.

I've tried replacing the battery and cleaning the connectors with isopropyl alcohol, but no luck.

Here is a video: https://www.youtube.com/watch?v=_IiF7B33...

Any ideas?

⟐ Answer accepted Ekim 24, 2019 at 11:50 GMT-7

⟐ Commented Nisan 30, 2021 at 10:05 GMT-7

Recently, while in the dark, I noticed that my flashlight (camera flash) on my iPhone 5S was no longer working when activated from the control center. I then began to debug it by rebooting, resetting and then finally by upgrading from iOS8 to iOS9. None of these fixed my problems but during the investigation, I noticed that the rear camera was no longer working as well. After some internet searching I do not really have a clear idea of whats wrong, as such, is why I am here.

This is something that I would like to try and fix myself if possible but would like some ideas of what else could be wrong here and if there are any additional debug steps. After hopefully identifying the problem, I will likely need to purchase the part(s) and doing the repair... so any thoughts or advice here would be welcome as well.

Thanks in Advance.

⟐ Commented Mart 30, 2021 at 5:23 GMT-7

⟐ Answered Eylül 22, 2018 at 6:23 GMT-7

⟐ Answered Temmuz 13, 2023 at 5:40 GMT-7

With this particular 5S, I successfully replaced the screen, only to discover that the part was faulty (defective digitizer). However, I know that Touch ID was functioning after this first screen was installed because I did test. I then installed another new part, everything went well and the part tested fine this time. I did not specifically test Touch ID functionality, but I do know that the home button was working. I've always figured that if the home button is working, then Touch ID is going to function.

The customer called me today to let me know that Touch ID is indeed not functioning at all, but the home button is. This seems very strange to me, and the only thing I can think of is that I didn't get the home button flex cable connector properly seated when I put everything back together. I will have a chance to open the phone back up tomorrow, but in the mean time I was trying to do a little research on potential causes for this as well as potential fixes. Of course, my hope is that removing the bracket, disconnecting, and reconnecting the flex cable will do the trick. Of course, unfortunately the simple solution isn't always the answer.

Numerous searches on here, Google, and other websites have turned up nothing with regards to this problem. Everything I can find relates to the unique relationship between the original home button cable and the motherboard, but that's it. I did find one person that had Touch ID functionality, but no home button functionality. Similar but still different enough to not be too helpful.

So...any ideas out there? Has anyone else come across this issue? Thanks in advance for any help!

⟐ Commented Mayıs 28, 2019 at 23:35 GMT-7

When I got to steps to remove adhesive tape, unfortunately the tape tabs just went off (just tore off) without removing adhesive from underneath the battery.

These are steps 21-25 here: How to replace the battery in your iPhone 5s

How can I still remove the old battery?

⟐ Answer deleted Temmuz 12, 2020 at 11:59 GMT-7

I was not able to get it into DFU, whenever i plug the phone in the the laptop and press the power button to turn it off, but the apple logo apears after 1 second and its back to the recovery mode again.

⟐ Answer deleted Mayıs 11, 2021 at 0:47 GMT-7

These are the two things I was looking;

The first, LOCA (Liquid Optical Clear Adhesive) Which is applied on the screen after separation and cleaning then after the removal of bubbles it is then cured under a UV lamp.

The second, OCA (Optically Clear Adhesive) which comes in pre-cut sheets that are applied to the LCD and the glass is attached.

I was originally leaning towards LOCA, and now OCA, but I have queries with the pressure methods of removing residual bubbles in the gap between the glass and the screen. There are two ways to remove bubbles, an autoclave, and a vacuum chamber. I am wondering, for anyone who has experienced, which works better for what method? Also, if the vacuum chamber is a viable option, do you think it would be possible to make your own (having the knowledge and tooling of course). Is heat necessary when removing bubbles? To my understanding it works best at roughly 60 degrees centigrade(140 degrees Fahrenheit). How do you heat the screen in a vacuum? Would any autoclave work? Or would I need to fork out the $1500 for a purpose built autoclave? What pressure is required for these bubble removals? I'm looking for the most cost effective professional method for performing glass only repairs on phones, while still having some level of automation and a high success rate? What do you guys recommend? I really appreciate any tips from guys already doing this. Thanks so much! :)

P.S. Could anyone explain exactly how each bubble removing method has an effect on each type of screen adhesive? I have heard that using an autoclave with LOCA would make it spit out the sides? The vacuum chambers make the bubbles expand and then come out the side, how long does this process take? It just seems to worsen it while looking at it. Sorry for all the questions but it's a lot to invest, especially for someone of my age (15).

Sorry if this belongs in Meta, I wasn't quite sure.

⟐ Answered Ağustos 11, 2025 at 0:25 GMT-7

The back story on this phone is that I purchased a slightly damaged black iphone that had a cracked display and bend case (corner). The phone functioned fine, as the damage was only cosmetic. The touch ID feature worked flawlessly. I decided to purchase a donor phone off eBay that was white (my preferred color). I swapped the logic/mother board out of my "damaged" phone and put it into the white phone. The new phone worked well, except the touch ID wouldn't setup. My research pointed to the problem being the home button (touch ID sensor) from the white phone was not compatible with the logic/mother board from the black phone. Apparently the touch ID and A7 processor are paired together when phone is manufactured and a replacement touch ID sensor will not work.

Knowing this, I purchased another donor phone that was in pristine condition and black in color. I swapped the logic/mother board out the the phone again and replaced the home button (touch ID sensor) and lighting flex into the new black phone. So the current phone setup has the originally paired logic/mothe board, home button (touch ID sensor), and lightning flex cable. Despite taking great care to ensure no parts were damaged and everything was installed correctly the phone still fails touch ID setup.

I have repaired several dozen iphones and I am very confident that no parts have been damaged during my repairs. I have tried restoring phone to new and the setup for touch ID still fails. I have tried both 8.1 and 8.1.1 ios software...no luck.

I am at a loss. Did exposing the A7 to an unpaired home button permanently disable touch ID forever (even after reintroducing the originally paired sensor)? Is there a security feature the permanently disables touch ID when a non-paired sensor is installed?

I visited my local apple store and talked with a "genius." I was told the touch ID feature should work, but I wasn't convinced that he was confident in his answer. Any ideas?

⟐ Answer deleted Ocak 04, 2019 at 9:03 GMT-7

⟐ Commented Kasım 19, 2020 at 12:22 GMT-7

i bought it of ebay thinking it's a easy battery fix. well... it wasn't. Apple doesn't what to replace the phone because the find my iPhone app is still on in the device.

Any suggestions?

⟐ Answered Kasım 08, 2019 at 17:27 GMT-7