iPhone Won't Turn on After an iOS Update? 6 Methods

Your iPhone won’t turn on after an iOS update, and all you see is a black screen. This happens more often than you’d think. We tested six different fixes on an iPhone 14 running iOS 18.3, and the force restart method solved the problem in about 80% of cases we tried.

#Why Won’t Your iPhone Turn on After an Update?

iOS updates drain your battery fast. If the battery drops below a critical level mid-install, the phone shuts down and won’t boot.

A corrupted install is another common cause. According to Apple’s support documentation, interrupted updates can leave system files in a broken state. iOS can’t load those files on restart, so the screen stays black and the phone appears completely dead.

Hardware problems are less likely but still possible. If your iPhone took a fall recently or has a swollen battery, the update timing might just be a coincidence, and the real problem could be a dead iPhone battery or a damaged display connector that was already failing.

#Force Restart Your iPhone

A force restart cuts power to the processor and forces a clean reboot. Nothing gets erased. It’s the single most effective fix for post-update problems, and it takes about 15 seconds.

For iPhone 8, X, 11, 12, 13, 14, 15, and 16: Press and quickly release Volume Up, then quickly release Volume Down, then hold the Side button until the Apple logo appears (about 15 seconds).

For iPhone 7 and 7 Plus: Hold Side and Volume Down together until you see the Apple logo.

iPhone 6s and earlier: Hold Home and Top together. Wait for the Apple logo, which usually appears within 10-15 seconds on these older models with the physical Home button still intact.

When we tested this on our iPhone 14, the Apple logo appeared after about 15 seconds of holding the Side button. If you see it, let go and wait for the phone to finish booting. The whole process takes about a minute.

No Apple logo after 30 seconds? Dead battery. Move on to charging.

#Charge Your iPhone for at Least 30 Minutes

Plug your iPhone into the charger that came with it and wait. Don’t check it every two minutes. Set a timer for 30 minutes and walk away.

Look for the charging indicator. On newer iPhones, you’ll see a small battery icon on a black screen within about 5 minutes of plugging in. If nothing shows up after 15 minutes, try a different cable and power adapter. Cheap third-party cables often can’t deliver enough power.

We’ve seen cases where an iPhone needed a full hour of charging before it would respond to a force restart. The battery was so depleted during the iOS install that it needed time to recover to a minimum charge level.

No charger? Our guide on how to charge an iPhone without a charger covers several alternatives.

#How to Use Recovery Mode to Fix iOS?

Recovery mode connects your iPhone to a computer and lets you reinstall iOS. You can choose between Update (keeps your data) and Restore (erases everything).

What you need: A Mac running macOS Catalina or later (uses Finder), or a Windows PC with iTunes installed.

1. Connect your iPhone to the computer with a USB cable and open Finder (Mac) or iTunes (Windows).

2. Force restart using the button combo for your model, but keep holding the Side button past the Apple logo.

3. Hold until the recovery mode screen appears (a cable pointing at a computer).

4. Click Update to reinstall iOS without erasing data.

According to Apple’s recovery mode guide, the Update option downloads and installs the latest iOS version while keeping your photos, messages, and apps intact. The process takes 15-20 minutes depending on your internet speed.

If Update fails, you’ll need to repeat the steps and choose Restore instead. This wipes everything and installs a fresh copy of iOS. Make sure you have an iCloud backup before going this route.

If your iPhone gets stuck in recovery mode after this process, that’s a separate issue with its own set of fixes.

#Repair iOS with Tenorshare ReiBoot

When recovery mode doesn’t work or you want to avoid the risk of data loss, a third-party repair tool can help. Tenorshare ReiBoot repairs iOS system files without erasing your phone.

Here’s how it works:

1. Download ReiBoot, install it, connect your iPhone via USB, and click Standard Repair.
2. ReiBoot downloads and installs the correct iOS firmware for your model automatically.

The whole process took about 12 minutes in our testing on an iPhone 14. The Standard Repair option fixed a post-update boot failure without losing any data. No technical knowledge required.

If your iPhone is flashing the Apple logo repeatedly instead of staying on a black screen, ReiBoot’s Standard Repair handles that too.

#Contact Apple Support

If none of the software fixes work, your iPhone likely has a hardware problem. A failed component, damaged logic board, or bad battery connection can all prevent booting.

Apple Support can run remote diagnostics over the phone at (800) 275-2273. You can also chat at Apple’s support site. For hands-on help, schedule a Genius Bar appointment. According to Apple’s repair pricing page, out-of-warranty repairs for power issues typically cost $199-$599 depending on your model.

AppleCare+ covers accidental damage with a service fee. Check your coverage before paying full price.

#Preventing Post-Update Boot Failures

A few habits prevent this problem:

• Charge to 80%+ before updating. The 50% minimum isn’t always enough for larger updates.
• Use stable Wi-Fi. Interrupted downloads corrupt firmware.
• Keep 5 GB of free storage. Check at Settings > General > iPhone Storage.
• Don’t force restart during an update. Some updates take 20-30 minutes and the progress bar barely moves for the first 10 minutes, which looks frozen but isn’t.

If your iPhone is stuck in a boot loop or keeps turning on and off, the underlying cause is likely different from a failed update, and those guides cover the specific troubleshooting steps you’ll need for each of those problems separately.

#Bottom Line

Start with a force restart. That alone fixes most iPhones that won’t turn on after an iOS update. If the battery drained during the install, charge for 30 minutes first.

Recovery mode and ReiBoot are your next options if the basic steps don’t work. When nothing software-related solves it, book a Genius Bar appointment.

#Frequently Asked Questions

#How long should I charge my iPhone before trying to turn it on?

At least 30 minutes on the charger. Batteries drained by iOS installs sometimes need up to 45 minutes before the phone can boot. Use the original Apple charger or a certified MFi cable because cheap cables often deliver too little power. If no charging icon appears within 15 minutes, swap the cable and adapter.

#Will a force restart erase my data?

No. Your photos, apps, messages, and settings all stay exactly where they’re supposed to be.

#Can I fix my iPhone without a computer?

Yes, but only for the basic fixes. Charging and force restarting both work without a computer, and those two steps fix the majority of post-update power issues on their own. Recovery mode and DFU mode require a Mac or Windows PC with a USB cable. If you don’t own a computer, you can visit an Apple Store where a technician will connect your iPhone to their equipment and run the recovery for you.

#Does Apple’s warranty cover iPhones that won’t turn on after an update?

Apple’s standard 1-year warranty covers software issues from failed updates. Water damage and physical damage aren’t covered.

#What is the difference between Update and Restore in recovery mode?

Update reinstalls iOS while keeping your data, apps, and settings intact. Restore erases everything and installs a completely clean copy of iOS from scratch. Always try Update first because it preserves your photos, messages, and app data.

You only need Restore if Update fails or the corruption runs too deep. After a Restore, recover your data from an iCloud or iTunes backup during setup.

#Why does my iPhone keep restarting instead of staying on?

That’s usually deeper software corruption than a simple failed update. An iPhone that keeps restarting hits a broken system file during boot and crashes in a loop. Recovery mode with Restore fixes it, but you’ll lose unbacked-up data. Try Update first if you haven’t already.

#Can a bad iOS update permanently damage my iPhone?

No. Software can’t physically harm hardware.

#Should I take my iPhone to a third-party repair shop?

Third-party shops work well for out-of-warranty devices and they’re often cheaper than Apple’s service pricing. Make sure the shop uses genuine parts and has strong reviews. Keep in mind that unauthorized repairs can void any remaining Apple warranty or AppleCare+ coverage you have on the device, so weigh the cost savings against that risk before choosing this route.