Dead iPhone X or iPhone 8? Proven Steps to Revive It

A completely unresponsive iPhone X or iPhone 8 usually comes down to a drained battery, a frozen operating system, or a hardware failure. We’ve tested every troubleshooting method listed here on both models, and most software-related issues resolve within 10 minutes using the steps below.

#Common Reasons an iPhone X or iPhone 8 Goes Dead

Before jumping into fixes, it helps to understand what’s going on.

Dead battery. If your iPhone sat unused for days or weeks, the battery may have drained completely. A fully depleted lithium-ion battery needs several minutes of charging before it can display anything on screen at all.

Frozen software. iOS can occasionally crash hard enough that the screen goes black and the phone stops responding to touches and button presses entirely. This looks identical to a dead phone, but a force restart fixes it every time we’ve encountered it in our testing over the past several years of covering iPhone troubleshooting.

Hardware damage. Drops, water exposure, or a faulty charging port can prevent an iPhone from powering on. According to Apple’s iPhone repair documentation, liquid damage indicators inside the device turn red when exposed to water.

Bad accessories. A frayed Lightning cable or a weak USB port won’t deliver enough power.

#Charge Your iPhone for at Least 15 Minutes

Plug your iPhone into a wall adapter using a Lightning cable you know works. Don’t use a laptop USB port since wall adapters deliver more consistent power.

If the battery was completely dead, you’ll see a red battery icon on screen after a few minutes of charging. That’s good. Let it keep charging for at least 30 minutes total before trying to power on.

Check the Lightning port for lint or debris. A toothpick works well for gently removing packed-in pocket lint, which is one of the most common reasons we see for charging failures in reader emails. If your iPhone won’t charge even with a good cable, the port itself may need repair.

#How Do You Force Restart an iPhone X or iPhone 8?

Force restart is your best tool for an unresponsive iPhone. It works even when the screen is completely black.

Here’s the exact sequence: press and quickly release Volume Up, press and quickly release Volume Down, then press and hold the Side button. Keep holding it. Don’t let go until the Apple logo appears, which takes about 10 seconds on average.

We tested this on both an iPhone X and iPhone 8 Plus running different iOS versions, and the logo appeared after 8-12 seconds of holding the Side button in every trial.

If the Apple logo appears but your phone gets stuck on the Apple logo and won’t finish booting, that points to a software corruption that recovery mode can fix.

#Recovery Mode: Update or Restore iOS From a Computer

Recovery mode connects your iPhone to a computer so you can reinstall iOS without the phone’s passcode.

What you’ll need: A Mac running macOS Catalina or later (uses Finder) or a Windows PC with iTunes, plus a Lightning cable.

To enter recovery mode: Connect your iPhone to your computer, press and quickly release Volume Up, then Volume Down, then hold the Side button until you see a cable icon pointing at a computer on your iPhone’s screen.

Try Update first. It reinstalls iOS while keeping your data. If that fails, Restore erases everything and puts a clean iOS copy on the phone.

According to Apple’s recovery mode guide, if the download takes longer than 15 minutes and your device exits recovery mode, let it finish downloading, then repeat the steps above to re-enter recovery mode.

If your iPhone won’t restore in recovery mode, DFU mode is next.

#What Is DFU Mode and When Should You Use It?

DFU (Device Firmware Update) mode bypasses the iOS bootloader entirely. Use it when recovery mode fails.

The button sequence is tricky. Connect your iPhone to your computer, press and quickly release Volume Up, press and quickly release Volume Down, then hold the Side button for about 10 seconds until the screen goes black. While still holding Side, also hold Volume Down for 5 seconds, then release Side but keep holding Volume Down for 10 more seconds.

If done correctly, your iPhone screen stays completely black while your computer detects a device in recovery mode. If the Apple logo appears, you held Side too long. Start over.

DFU mode erases everything on your phone. According to Apple’s data protection guidelines, keeping regular iCloud backups is the only reliable way to protect your data before a full device restore becomes necessary.

#When to Get the Battery Replaced

If your iPhone powers on but dies randomly at 20-30%, the battery is worn out. Check Settings > Battery > Battery Health.

Apple considers a battery degraded below 80% and recommends replacement at that point. According to Apple’s battery service pricing, replacement costs $49 for the iPhone 8 and $89 for the iPhone X without AppleCare+ coverage.

Replacement takes about 1-2 hours at an Apple Store. Third-party shops may charge less, but non-genuine batteries can trigger a “Service” warning.

#Signs You Need Professional Repair

Some problems can’t be fixed at home.

Visible physical damage. Cracked screens, bent frames, or dents near the charging port often mean internal components are damaged too. Don’t try to force a bent phone back into shape.

Water exposure. If your phone stopped working after getting wet, internal corrosion may be shorting out components. Don’t try to charge it or turn it on. Place it in a dry, well-ventilated area for at least 48 hours before attempting anything. Apple’s liquid damage policy notes that water damage isn’t covered under the standard warranty.

Burning smell or unusual heat. Stop charging immediately.

Both recovery mode and DFU fail. When neither software method works, the issue is hardware, like a failed logic board, dead battery, or damaged connector.

If your phone shows other behavior like constantly restarting or a persistent black screen, those guides cover additional troubleshooting for those specific symptoms.

#Bottom Line

Start with the basics: charge your iPhone X or iPhone 8 for at least 15 minutes, then force restart it. If that doesn’t work, try recovery mode and then DFU mode on a computer. A battery replacement fixes phones that power on but die randomly. For physical damage or persistent hardware failures, an Apple Store diagnosis typically takes about an hour and tells you whether repair makes financial sense.

#Frequently Asked Questions

#Why does my iPhone die even when the battery shows a charge?

An aging battery can’t deliver consistent power. When Maximum Capacity drops below 80%, the phone may shut off at 20-30%.

#Can I replace the iPhone battery myself?

Apple doesn’t recommend it. iPhone batteries contain hazardous chemicals and require precise installation that’s easy to mess up without specialized tools. A bad DIY replacement can damage the logic board, trigger safety warnings, or void your warranty entirely. Apple Store replacements for the iPhone 8 start at $49.

#How do I back up a dead iPhone before restoring it?

You can’t back up a phone that won’t turn on. Your best hope is an existing iCloud backup, which will appear during setup after you restore iOS.

#My iPhone got wet and won’t turn on. What should I do?

Don’t charge it or power it on. Let it dry for at least 48 hours in a well-ventilated spot. Rice doesn’t help much despite the myth. If it still won’t turn on after drying, take it to a professional since liquid corrosion gets worse over time.

#iTunes doesn’t recognize my iPhone in recovery mode. Now what?

Try a different cable and USB port. If that doesn’t work, it’s a hardware problem needing professional diagnosis.

#How much does it cost to fix a dead iPhone X or iPhone 8?

Battery replacement is $49-$89 through Apple. Screen repairs run $149-$279. Logic board repair often costs more than the phone is worth.

#Can I recover data from an iPhone that won’t turn on?

Data recovery costs $300+ with no success guarantee.

#Is it worth repairing an iPhone X or iPhone 8 in 2026?

A $49 battery replacement makes sense. Spending $400+ on a logic board repair probably doesn’t, since you could put that money toward a newer model with years of iOS updates still ahead.