How do I know if my iPhone has a hardware problem?

If force restart, Recovery Mode, and DFU Mode all fail, and the phone shows no response at all (no vibration, no Apple logo), it's likely a hardware issue — dead battery, logic board failure, or liquid damage.

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iPhone Won't Turn On? Here's How to Fix It

Q: Will Recovery Mode erase my iPhone?

Choosing "Update" in Recovery Mode preserves your data. Choosing "Restore" erases all data but reinstalls iOS fresh.

Q: What if my iPhone is stuck on the Apple logo?

Force restart first. If it keeps looping on the Apple logo, put it in Recovery Mode and use Finder/iTunes to Update. If Update fails, Restore.

Q: Can water damage cause an iPhone not to turn on?

Yes. Water damage can cause short circuits on the logic board. If your iPhone got wet, do not charge it — let it dry for 48 hours in a bag of silica gel. If it still won't turn on, it needs professional repair.

An iPhone that won't turn on is usually suffering from a dead battery, a software freeze, or a failed update — not a hardware failure. Follow these steps from simplest to most advanced before considering a repair.

Start here: Plug your iPhone into a charger for at least 15–30 minutes. If the battery is completely dead, it needs some charge before the screen will respond. Use the original Apple cable and a wall adapter (not a computer USB port, which delivers less power).

Common Reasons an iPhone Won't Turn On

Completely drained battery — If the battery drops to 0% and sits for a while, it may need extended charging before the screen activates
Software crash or freeze — iOS can freeze during an update, app crash, or background process, leaving the screen black
Failed iOS update — An interrupted update (loss of power during installation) can leave the phone in a bricked state
Faulty charging cable or adapter — A damaged cable may not deliver enough power, making you think the phone is dead
Water or liquid damage — Exposure to moisture can cause short circuits on the logic board
Hardware failure — A dead battery, faulty display, or damaged logic board requires professional repair

Step-by-Step Fixes

Step 1 — Charge Your iPhone Properly

Use the original Apple USB cable and the included wall adapter (not a computer USB port, which delivers less power). Plug it in and wait at least 15–30 minutes. After 15 minutes, check for the low-battery icon (a red battery with a lightning bolt). If you see nothing after 30 minutes, try a different cable, a different adapter, and a different wall outlet. Also check the Lightning or USB-C port for lint or debris — compressed air can clean it out.

Step 2 — Force Restart (iPhone 8 and Later, Including All Face ID Models)

1. Press and quickly release Volume Up button
2. Press and quickly release Volume Down button
3. Press and hold the Side button (on the right side) until the Apple logo appears — keep holding for about 10–20 seconds

Do not release when the screen goes black — wait until you see the Apple logo. If the screen shows the Apple logo, the phone is booting. If nothing happens, proceed to the alternate methods.

Step 2 (Alternate) — Force Restart iPhone 7 and 7 Plus

Hold Volume Down + Sleep/Wake (side button) simultaneously until the Apple logo appears — about 10–15 seconds. Release both buttons when the logo appears.

Step 2 (Alternate) — Force Restart iPhone 6s, 6s Plus, and Earlier

Hold Home button + Sleep/Wake (top or side button) simultaneously for at least 10 seconds. Release both when the Apple logo appears. On iPhone SE (1st generation), use this same method.

Step 3 — Put iPhone in Recovery Mode

Connect iPhone to your Mac or PC with a cable. Open Finder (macOS Catalina or later) or iTunes (Windows or older macOS). Perform the force restart sequence for your model but keep holding the Side button even after the Apple logo appears — continue holding until you see the "Connect to iTunes/Finder" screen (a cable icon pointing to a laptop). Click Update first (this preserves your data by reinstalling iOS without erasing). If Update fails after 15 minutes or shows an error, click Restore (this erases all data).

Step 4 — DFU Mode (Last Software Resort)

DFU (Device Firmware Update) mode is the deepest restore mode — it bypasses iOS entirely and communicates directly with the device firmware. Use this only if Recovery Mode fails.

For iPhone 8 and later:
1. Connect to computer with Finder/iTunes open
2. Press and quickly release Volume Up → quickly release Volume Down
3. Press and hold the Side button for 3 seconds
4. While still holding Side, also press and hold Volume Down for 10 seconds
5. Release Side button, keep holding Volume Down for 5 more seconds

Your iPhone screen should stay completely black. If you see the Apple logo or Connect-to-iTunes screen, you did it wrong — start over. Finder/iTunes will show "iPhone in Recovery Mode." Click Restore.

Step 5 — Check for Screen Damage

Sometimes the iPhone is actually on but the display is dead. Listen for sounds (calls, notifications, vibrations). Try calling the phone from another device — if it rings or vibrates, the phone is working but the screen is not. Connect to iTunes/Finder — if it shows your iPhone info, the phone is alive. In this case, the display, display cable, or backlight needs repair. An Apple Store or authorized repair center can diagnose this.

Step 6 — Hardware Diagnosis

If none of the above work — no response from force restart, Recovery Mode, or DFU Mode — the issue is almost certainly hardware. Common hardware causes:

Dead battery: iPhone batteries degrade over 2–3 years. A completely dead battery can't hold enough charge to boot. Symptom: phone was working fine, died suddenly, and won't charge past 0%.
Failed logic board: Water damage, drops, or component failure can damage the main board. Symptom: no response at all to any software recovery method.
Tristar/Hydra chip damage: Common on iPhones charged with non-Apple or cheap third-party chargers. Causes the phone to not recognize chargers and eventually not turn on.
Water/liquid damage: Even water-resistant iPhones can suffer damage from immersion or high-humidity environments.

iPhone Stuck on Apple Logo (Boot Loop)

Fix Boot Loop with Recovery Mode

If your iPhone shows the Apple logo for a few seconds, then goes black, then shows the logo again repeatedly, it's in a boot loop. This usually happens after a failed iOS update or a jailbreak gone wrong. Put the phone in Recovery Mode (Step 3 above) and click Update. This reinstalls iOS without erasing your data. If Update doesn't fix it, you may need to Restore, which will erase everything — but you can restore from your last iCloud or iTunes backup after setup.

iPhone Shows "Connect to iTunes" or "Connect to Computer" Screen

Recovery Mode Screen Without Being in Recovery Mode

If your iPhone shows the cable-to-computer screen but you didn't put it in Recovery Mode intentionally, the phone has detected a software problem. Connect it to a computer with Finder/iTunes and click Update. This is often caused by an interrupted iOS update or a corrupted iOS installation. The Update option preserves your data in most cases.

iPhone Not Turning On After Getting Wet

What to Do After Water Exposure

If your iPhone got wet and won't turn on:

Do NOT charge it — charging a wet phone can cause further short-circuit damage
Wipe the exterior dry with a soft cloth
Tap the phone (connector port facing down) to shake out water from the Lightning/USB-C port
Place the phone in a bag of silica gel packets (not rice — rice dust can enter the ports) for 48 hours
After 48 hours, try charging and force restarting
If it still doesn't turn on, the logic board has likely been damaged — seek professional repair

Check iPhone Battery Health

Frequently Asked Questions

Why won't my iPhone turn on even when charging?

If the battery is completely drained, it can take 10–15 minutes of charging before any screen appears. Make sure you're using a known-good cable and adapter — test with a different cable. Also clean the charging port with a toothpick or compressed air to remove lint, which can prevent the cable from making proper contact.

Will Recovery Mode erase my iPhone?

Choosing "Update" in Recovery Mode preserves your data — it reinstalls iOS over the existing installation. Choosing "Restore" erases all data on the iPhone and installs a fresh copy of iOS. Always try Update first. Only use Restore if Update fails. You can restore from an iCloud or computer backup after a Restore.

What if my iPhone is stuck on the Apple logo?

This is a boot loop, usually caused by a failed software update or corrupted system files. Force restart the phone first. If it keeps looping back to the Apple logo, put it in Recovery Mode and use Finder/iTunes to Update iOS. If Update fails, Restore is your last software option before considering hardware repair.

How do I know if it's a hardware problem?

If none of the software fixes work — no response to force restart, Recovery Mode shows nothing in Finder/iTunes, DFU Mode doesn't detect the device — it's almost certainly a hardware problem. Other signs: the phone gets extremely hot while charging, the screen flickers, it shuts down at random battery percentages (like 30%), or it was dropped or exposed to water recently.

Can water damage cause an iPhone not to turn on?

Yes. Water or any liquid can cause short circuits on the iPhone's logic board, damaging delicate components. Even though newer iPhones are IP68 water-resistant, this rating decreases over time and doesn't cover immersion in certain liquids. If your iPhone got wet, don't charge it — dry it with silica gel for 48 hours, then try turning it on. If it doesn't work, it needs professional board-level repair.

When to Visit Apple Store or an Authorized Repair Center

If you've exhausted all the software troubleshooting steps above (force restart, Recovery Mode, DFU Mode) and your iPhone still shows no signs of life, it's time for professional help. Book a Genius Bar appointment at an Apple Store or visit an Apple Authorized Service Provider. They can run hardware diagnostics that aren't available to consumers, check for liquid damage indicators (LDIs) inside the phone, and provide a repair estimate. If your phone is covered by AppleCare+, hardware repairs may be covered (subject to the service fee listed in your plan). Out-of-warranty repairs vary by model but typically range from $89 (battery) to $599 (other damage) depending on the iPhone model.