iPhone not turning on is one of those problems that stops everything — you press the side button, nothing happens, the screen stays completely black, and there is no response at all. No Apple logo, no charging indicator, no vibration.
iPhone not turning on has very different causes depending on when it started. An iPhone that won’t turn on after the battery drained completely is a different problem from one that went black after an iOS update, and both are different from a phone that randomly stopped responding with no warning. This guide covers all four situations with the exact cause and the step-by-step fix for each one.
Quick answer: Most iPhone not turning on issues come from a fully depleted battery that needs 15–30 minutes of charging before it can power on, a crashed iOS system that requires a force restart, a failed iOS update that requires recovery mode, or a hardware fault such as a damaged charging port or swollen battery. All four scenarios below have specific fixes.
iPhone Not Turning On — Table of Contents
- iPhone Not Turning On — General Causes and Fixes
- iPhone Not Turning On After Battery Dies
- iPhone Not Turning On After iOS Update
- iPhone Not Turning On Randomly
- Final Checklist Before You Contact Apple
- Frequently Asked Questions
iPhone Not Turning On — General Causes and Fixes
Before going into the specific scenarios, it helps to understand what “not turning on” actually means for an iPhone — because the correct fix depends entirely on the exact failure mode, and using the wrong fix wastes time and can make things worse.
An iPhone that shows absolutely nothing — no screen, no logo, no charging animation — when the side button is pressed is in one of three states: it has no power, its software has crashed completely, or its hardware has failed. Each state requires a different approach, and identifying which state the iPhone is in is the first step before attempting any fix.
The single most important thing to check first is whether the iPhone is simply out of battery. An iPhone with a completely depleted battery does not turn on immediately when plugged in — it requires 15 to 30 minutes of charging before it accumulates enough power to display the charging animation and eventually boot. Attempting to force restart an iPhone that is simply out of battery will not work and is not necessary.
Most Common Causes of iPhone Not Turning On
A completely depleted battery is the most common cause of iPhone not turning on. Unlike older phones, iPhone requires a minimum charge threshold before it can power on at all. An iPhone left uncharged for an extended period — particularly one with an aging battery that drains faster than expected — may appear completely dead when it simply needs time to accumulate charge before attempting to boot.
A software crash or frozen iOS system is the second most common cause. iOS can crash in a way that leaves the screen completely black and unresponsive — the iPhone is technically powered on internally but the display and input systems are unresponsive. This is resolved with a force restart, not charging.
A failed iOS update is a third cause. If an iOS update was interrupted — by a low battery, a connectivity loss, or a crash during installation — the iPhone can be left in a partially updated state where it cannot complete booting and cannot recover on its own. This requires recovery mode via a computer.
A damaged charging port or faulty charging cable is a fourth cause. An iPhone that appears dead may simply not be charging due to a damaged port, a non-certified cable, or debris in the Lightning or USB-C port. The iPhone has actually depleted its battery and cannot charge to recover — not because the software has failed but because no charge is reaching the battery.
General Fixes for iPhone Not Turning On
Step 1 — Charge for 30 minutes before doing anything else.
Connect iPhone to a wall charger — not a computer USB port
Use: Apple-certified Lightning or USB-C cable and adapter
Wait: minimum 15–30 minutes without touching the iPhone
Expected: charging animation appears on screen after 15–30 minutesDo not attempt a force restart until the iPhone has been charging for at least 15 minutes from a wall adapter. Computer USB ports provide lower current and may not be sufficient to charge a fully depleted iPhone. If no charging animation appears after 30 minutes, proceed to the next step.
Step 2 — Perform a force restart.
Force restart procedure varies by iPhone model:
iPhone 8 and later (including all Face ID models):
→ Press and quickly release Volume Up
→ Press and quickly release Volume Down
→ Press and hold Side button until Apple logo appears (10–15 seconds)
iPhone 7 and 7 Plus:
→ Press and hold Volume Down + Sleep/Wake simultaneously
→ Hold until Apple logo appears
iPhone 6s and earlier:
→ Press and hold Home + Sleep/Wake simultaneously
→ Hold until Apple logo appearsA force restart does not erase data. It is equivalent to cutting power to the device and restarting — it clears a frozen software state without affecting personal data or settings.
Step 3 — Try a different cable and power adapter.
Test: use a different Apple-certified Lightning or USB-C cable
Test: use a different power adapter — minimum 5W, preferably 20W
Test: try a different power outlet
Check: look inside the charging port for lint, debris, or corrosionDebris in the charging port is a surprisingly common cause of iPhone not turning on that appears to be a software or hardware failure. Use a dry toothbrush or canned air to gently clean the port — never use metal objects or liquids.
Step 4 — Check for physical damage.
Inspect: screen for cracks that could affect display function
Inspect: charging port for bent pins or corrosion
Check: has the iPhone been exposed to water recently?
Check: has the iPhone been dropped or subjected to impact?An iPhone that has been dropped can suffer internal damage — particularly to the battery connector or display cable — that produces a “not turning on” symptom even when the software is intact and the battery has charge.
iPhone Not Turning On After Battery Dies
The iPhone battery ran down to zero. The iPhone turned off. Now it will not turn on even after being plugged in for a period of time, or it turns on briefly and then shuts off again.
Why iPhone Won’t Turn On After Battery Dies
Deep discharge causing the battery to require extended recovery time is the most common cause. A lithium battery that has been discharged completely — particularly one that has aged and has reduced capacity — can require 30 to 60 minutes of charging before accumulating sufficient charge to power on. Attempting to turn on the iPhone before this threshold is reached produces no response.
A non-certified or low-quality charging cable delivering insufficient current is a second cause. After a complete discharge, iPhone requires stable, sufficient current to begin charging. A cheap or counterfeit cable may deliver inconsistent or insufficient current — the iPhone receives some power but not enough to cross the threshold required to display the charging animation or boot.
How to Fix iPhone Not Turning On After Battery Dies
Step 1 — Charge for a minimum of 30 minutes using a wall adapter.
Required: Apple MFi-certified cable and Apple or certified 20W adapter
Plug in and do not touch the iPhone for 30 minutes
After 30 minutes: the charging animation (battery icon) should appear
If animation appears: wait for iPhone to boot automatically — do not press buttonsStep 2 — Force restart after 30 minutes if no response.
After 30 minutes charging with no display: perform force restart
iPhone 8 and later: Volume Up → Volume Down → Hold Side button 15 seconds
Expected: Apple logo appears → iPhone boots normallyStep 3 — Replace the charging cable and adapter if still no response.
Test with: Apple original cable and 20W Apple power adapter
Avoid: third-party cables from unknown brands, particularly for deeply discharged batteries.iPhone Not Turning On After iOS Update
The iPhone was updating to a new iOS version. The update appeared to be installing — the progress bar was moving or the Apple logo was showing — and then the iPhone went black and has not responded since.
Why iOS Update Causes iPhone Not Turning On
A failed or interrupted update leaving the iPhone in an incomplete boot state is the primary cause. If the iPhone ran out of battery during the update, lost its connection to the update server, or experienced a software crash during installation, it can be left in a state where it cannot complete booting. This state is not recoverable with a force restart alone — it requires recovery mode via a Mac or PC.
How to Fix iPhone Not Turning On After iOS Update
Step 1 — Attempt force restart first.
iPhone 8 and later: Volume Up → Volume Down → Hold Side (15 seconds)
If Apple logo appears and iPhone boots: update may have completed successfully
If Apple logo appears then disappears (boot loop): proceed to recovery mode
If no response: proceed to recovery modeStep 2 — Put iPhone into Recovery Mode using a Mac or PC.
On Mac: open Finder (macOS Catalina or later) or iTunes (older macOS)
On PC: open iTunes
Connect iPhone to computer using USB cable
Perform force restart but hold Side button even after Apple logo
Continue holding until Recovery Mode screen appears (cable and laptop icon)
In Finder/iTunes: choose Update (not Restore) first to preserve dataRecovery mode Update reinstalls iOS without erasing personal data. If Update fails, Restore erases and reinstalls iOS — data on the device is lost, though iCloud and iTunes backups can be restored afterward.
Step 3 — Check for follow-up iOS update after recovery.
After recovery: Settings → General → Software Update
Install any available update immediatelyiPhone Not Turning On Randomly
The iPhone was working normally. Without any obvious trigger — no update, no battery drain, no drop — it simply went black and stopped responding. No warning, no error message.
Why iPhone Stops Turning On Randomly
A software crash leaving the system in an unresponsive state is the most common cause of apparently random iPhone not turning on. This is resolved with a force restart in the majority of cases.
An aging or swollen battery causing sudden shutdown is a second cause. Batteries that have degraded significantly — showing capacity below 80% in Settings → Battery → Battery Health — can experience sudden voltage drops under load, causing the iPhone to shut down without warning and then refuse to restart because the remaining charge is insufficient.
Thermal shutdown due to overheating is a third cause. An iPhone that overheated — from prolonged gaming, GPS use in a hot car, or direct sunlight exposure — shuts itself down to prevent damage and may appear to not turn on while still warm. Allowing the iPhone to cool to room temperature before attempting to restart resolves thermal shutdowns.
How to Fix Random iPhone Not Turning On
Step 1 — Perform force restart immediately.
iPhone 8 and later: Volume Up → Volume Down → Hold Side (15 seconds)
If Apple logo appears: iPhone was in a software crash state — monitor for recurrenceStep 2 — Check battery health if force restart works.
Settings → Battery → Battery Health & Charging
If Maximum Capacity is below 80%: battery requires replacement
Contact Apple Support or Apple Authorized Service Provider for replacementStep 3 — Allow iPhone to cool if it was warm before shutdown.
Place iPhone in a cool, shaded environment
Wait 15–20 minutes before attempting to restart
Thermal shutdowns resolve on their own once temperature normalisesFinal Checklist — iPhone Not Turning On
- Charged for minimum 30 minutes from wall adapter — not computer USB
- Used Apple-certified cable and adapter
- Force restart attempted after charging period
- Charging port inspected for debris and cleaned
- Physical damage inspected — screen, port, body
- Recovery mode attempted if update was in progress
- Battery health checked — Settings → Battery → Battery Health
- iPhone allowed to cool if overheating was possible
- Different cable and adapter tested
- iCloud backup verified before any Restore operation
When to Go to Apple Directly for iPhone Not Turning On
Contact Apple Support if:
- iPhone does not respond to force restart after 30 minutes of wall charging
- iPhone enters boot loop — Apple logo appears then disappears repeatedly
- Recovery mode Update fails and Restore is required
- iPhone has visible physical damage — cracked screen, damaged port, water exposure
- iPhone shuts down randomly and repeatedly after battery replacement
Frequently Asked Questions — iPhone Not Turning On
Why is my iPhone not turning on? The most common reasons are a completely depleted battery needing 15–30 minutes of wall charging before responding, a frozen iOS system requiring a force restart, or a failed update requiring recovery mode. Start by charging from a wall adapter for 30 minutes without touching the phone.
How do I force restart an iPhone that won’t turn on? On iPhone 8 and later: quickly press and release Volume Up, quickly press and release Volume Down, then press and hold the Side button for 10–15 seconds until the Apple logo appears. This works even when the screen is completely unresponsive.
Will force restart delete my data? No. A force restart is equivalent to cutting power and restarting — it does not erase any data, settings, or apps. It only clears a frozen software state.
How long should I charge a dead iPhone before it turns on? Charge for a minimum of 15–30 minutes from a wall adapter before expecting any response. A fully depleted battery, particularly an aged one, needs this time to accumulate sufficient charge to cross the boot threshold. Using a computer USB port instead of a wall adapter slows this process significantly.
Can a failed iOS update cause iPhone not to turn on? Yes. If an update was interrupted by a battery drain or crash, the iPhone can be left in an incomplete state requiring recovery mode. Connect to a Mac or PC, open Finder or iTunes, put the iPhone in recovery mode, and choose Update to reinstall iOS without erasing data.
Quick Reference Table
| Situation | Most Likely Cause | First Fix |
|---|---|---|
| Won’t turn on at all | Depleted battery | Charge 30 min from wall adapter |
| Black screen, was working | Software crash | Force restart |
| Won’t turn on after update | Failed update installation | Recovery mode → Update |
| Turns on then off repeatedly | Boot loop / corrupt iOS | Recovery mode → Update |
| Won’t charge or turn on | Damaged port or cable | Clean port, try different cable |
| Random shutdown, won’t restart | Aged battery | Force restart, check Battery Health |
Conclusion
iPhone not turning on almost always comes down to one of four things — a depleted battery that needs time to charge before it can boot, a crashed iOS system that needs a force restart, a failed update that requires recovery mode, or a hardware issue like a damaged charging port or aged battery.
Start with the scenario that matches when your problem began. Battery drain — charge for 30 minutes then force restart. After an update — force restart first, then recovery mode if boot loop persists. Random with no warning — force restart, then check battery health in Settings.
Apple Support can run diagnostics remotely and check for hardware faults. Contact them before spending money on repairs or replacements.