If your iPhone will not turn on, the problem is often a dead battery, a frozen system, a bad cable or charger, or hardware damage from a drop or water.
The most common reasons are a completely drained battery, a frozen iOS process, a faulty charging accessory, or a damaged display or logic board.
Use a cable and charger you know work. Leave the phone plugged in for at least 30 minutes before checking again.
Use the correct button sequence for your iPhone model to force a restart. This often fixes a frozen black screen.
A broken charging accessory can make the battery look dead when it is not.
If Finder or iTunes detects the phone, you may be able to update or restore it from recovery mode.
If force restart does not work, put the iPhone into recovery mode and choose Update first if available.
If the phone was dropped or got wet, the issue may be hardware-related and require service.
If the phone still shows no response after charging, force restart, and recovery mode, a battery or logic board problem may be the cause.
A degraded battery is one of the most common reasons iPhones fail to turn on or shut down unexpectedly. Check the Maximum Capacity in Settings, Battery, Battery Health every few months. If it drops below 80 percent, consider replacing the battery preventively rather than waiting for a failure. Avoid letting the battery drain to zero regularly, since deep discharges accelerate chemical aging. Keeping the charge level between 20 and 80 percent for daily use extends the battery's overall lifespan and reduces the likelihood of battery-related startup failures.
Damaged or uncertified charging cables and adapters can deliver inconsistent power that confuses the iPhone's charging circuitry and may cause the device to appear completely dead. Stick to MFi-certified cables and Apple-certified power adapters. Inspect your charging cable regularly for fraying near the connector ends, and replace it at the first sign of wear. A bad cable that intermittently fails to deliver power is a frequent cause of the iPhone seemingly not turning on when in reality it simply has not received enough charge to start the boot process.
Apple's iOS updates often include power management improvements, battery calibration fixes, and bug patches that affect how the iPhone handles low-power states and startup sequences. Enable automatic updates in Settings, General, Software Update so the device installs these improvements without requiring manual intervention. Keeping iOS current reduces the chance of encountering a software-level startup failure that could have been prevented by a patch that addresses a known power-state transition bug or charging controller issue.
A fully drained battery can take 10 to 15 minutes before any screen appears. Try a different cable or charger to rule out accessory problems.
Choosing Update in Recovery Mode preserves data. Choosing Restore erases data and reinstalls iOS.
Try a force restart first. If it keeps looping, use Recovery Mode to update or restore the device.
Yes. Water damage can short circuit internal components. If the phone got wet, avoid charging it until it has dried thoroughly.
Try the same service on a different device or network. If it works elsewhere, the issue is local to your device or network. If it fails everywhere, the service itself may be down - check Downdetector or the service's official status page to confirm.
Yes. A full restart (not just closing the app) clears stale connections, frees memory, and resolves the majority of intermittent glitches. Try this before deeper troubleshooting steps.
Open the App Store (iPhone) or Google Play Store (Android) and search for the app - if an Update button appears, tap it. On desktop apps, look for an About or Check for Updates option in the menu. Outdated apps often break after server-side updates.
If clearing the cache, updating, and restarting have all failed, reinstall the app as a last resort. A clean reinstall removes corrupted data, settings, and permissions that the standard fix steps cannot reach. Your account and saved data are stored in the cloud, so you won't lose anything by reinstalling.
The force restart sequence varies by iPhone model. For iPhone 8 and later including SE 2nd and 3rd gen, quickly press and release the Volume Up button, then Volume Down, then press and hold the Side button until the Apple logo appears. For iPhone 7 and 7 Plus, press and hold both the Volume Down and Side buttons simultaneously until the logo appears. For iPhone 6s and earlier, press and hold both the Home button and the Top or Side button until the Apple logo shows. Hold the final buttons for at least 10 to 15 seconds even if the screen stays black initially, since a deeply frozen iPhone can take longer than expected to respond to the forced restart command.
Yes, connecting a non-responsive iPhone to a computer can help in two ways. First, if the iPhone has enough residual battery to be detected, the computer may recognize it in iTunes or Finder even though the screen is black, allowing you to update or restore the software. Second, the USB connection delivers a small amount of power that may be enough to wake the charging circuit when a wall charger has failed. Leave the iPhone connected to the computer for 30 minutes to an hour before attempting a force restart. If the computer does not detect the device at all, the issue is more likely hardware-related than software-related.