iOS 15 Update: iPhone Won’t Turn on Issue [Solved]

Issues like iOS 15 update: iPhone won’t turn on can bother users much. If you are wondering “Why my iPhone won’t turn on”, check it out here.

By @Lora Last Updated October 31, 2024

Anyone can help? Why won’t my iPhone turn on after iOS 15 update?

A bunch of attractive new features comes with a new iOS software every year. With so many users choosing to update their devices, acclaims and complaints flood in.

Some users cannot complete the update process but won’t turn on, like getting stuck on the white screen, loading circle, black screen, or rebooting loop.

My iPhone 11 max pro worked perfectly fine until apply pushed the 14.7 update to it. From there, it was constant apple loops and 100+ attempts to restore my phone with no luck.

- Question from Apple Developer

And the iOS 15 does not escape from that. Some users reported the iOS 15 update: iPhone won’t turn on issue.  Some even need to recover lost data after iOS 15 update. Then how to fix an iPhone that won’t turn on? Let’s move on to the manifestation and reasons for it first.

Symptoms of iOS 15 update: iPhone won’t turn on issue

When you try to update your iPhone to iOS 15, you may meet these problems.

  • The iPhone gets stuck on a white/black screen or the Apple icon screen.
  • Your iPhone may give no reaction when being charged, staying black.
  • You may manage to turn it on but get stuck with no progress bar showing in several minutes or hours.
  • Your iPhone may restart itself again and again.

Reasons for iPhone won’t turn on or charge after iOS 15 update

Then why an iPhone won’t turn on or charge? Here are some possible reasons.

  • Out of battery. When you try to charge your iPhone but get no reaction, it could result from the update. An update requires a certain degree of power.
  • Firmware crash. The iOS 15 firmware may get corrupted when you try to download it.
  • System issues. The installation can meet some errors with a system crash, leading to an iPhone that won’t turn on.
  • Hardware crash. Physical damage or liquid can lead to hardware-related issues. When meeting this, you’d better turn to Apple Support.

How to solve iOS 15 update: iPhone won’t turn on issue?

Then how to fix an iPhone that won’t turn on? Some users may don’t know what to do when iPhone won’t turn on. Here three troubleshooting methods are ready for you. 

Solution 1. Connect your device to a power supply

“Why won’t my iPhone turn on after iOS 15 update?” When you managed to update your device, but then it turned off automatically and give no response, you may need to charge your iPhone. It might be because the update consumes too much power. Here you need to charge your iPhone for 1 hour.

Tips: It is suggested to connect your iPhone to a power supply when upgrading via a lightning cable.

Solution 2. Solve iOS 15 update: iPhone won’t turn on issue by force restarting  

If unluckily, you still cannot boot up your iPhone by charging it, you may have to force restart it.

Tips: This method adapts to the situation that your iPhone is totally black.
  • For iPhone 8/later. Press and quickly release the Volume Up button, then press and fast release the Volume Down button, and then hold the On/Off button until the Apple logo shows up.
  • For iPhone 7/7 Plus. Press and hold both the On/Off button and the Volume Down button at the same time until the Apple logo comes out.
  • For iPhone 6s/earlier. Press and hold both the Home button and the On/Off button, do not let go until you see the Apple logo.

Solution 3. Solve iOS 15 update: iPhone won’t turn on issue by entering Recovery Mode

If you managed to turn your iPhone on, but it got stuck during the process/ you saw a red/blue screen/ you met a rebooting loop, you may have to set it to Recovery Mode.

Step 1. Connect your iPhone to a computer via a lightning charging cable, run iTunes on your computer.

Step 2. Then follow the steps below to enter the Recovery Mode.

◆ For iPhone 8/later. Press and quickly release the Volume Up button, then press and fast release the Volume Down button, and then hold and do not let go of the On/Off button until you see the Recovery Mode screen.

◆ For iPhone 7/7 Plus. Press and hold both the On/Off button and the Volume Down button at the same time until you see the Recovery Mode screen.

◆ For iPhone 6s/earlier. Press and hold both the Home button and the On/Off button, keep holding them until you see the Recovery Mode screen.

Then when you see a pop-up window, choose “Update”.

Bonus tips

In this article, we introduced how to fix an iPhone that won’t turn on. 3 feasible methods are ready for users to solve the iOS 15 update: iPhone won’t turn on issue. If all these methods cannot help you, you could also downgrade iOS 15 to iOS 14 without losing data.

In the process of updating, so many unexpected errors or problems will occur, so before doing any operations like entering Recovery Mode, resetting, or updating, it is highly recommended to back up your data first to avoid any loss.

Here AOMEI FoneBackup can be your helper to save your data securely with its stunning features like, “Full Backup”, “Photos Backup”, and “Custom Backup”.