iPhone won't turn on, battery seems dead

Symptoms

• Screen stays completely black with no response to any button
• No vibration or sound when plugged in
• Phone doesn't respond to the charging cable at all
• Apple logo doesn't appear even after several minutes on the charger

Likely causes

• CommonBattery fully discharged for an extended timeA battery left at 0% for weeks can take 10–15 minutes on the charger before showing any sign of life.
• CommonCharging accessory or port issue preventing any charge from reaching the batteryA bad cable, adapter, or debris-filled port can look exactly like a dead phone.
• PossibleSoftware freeze requiring a forced restartA crashed operating system can leave the screen black even with a charged battery.
• PossibleBattery has failed and can no longer hold or accept a chargeA battery that's fully worn out won't respond even to a known-good charger.

What to do

1. Plug the phone into a wall outlet, not a computer, using a known-good cable and adapter.
2. Leave it plugged in and untouched for at least 15–20 minutes before checking again.
3. Check the charging port for lint or debris and clean gently if needed.
4. Force restart: quick press volume up, quick press volume down, then hold the side button until the Apple logo appears, keeping it held even past a black screen.
5. Try a completely different cable, adapter, and outlet to rule out the charging chain.
6. Watch for any charging animation, sound, or faint screen glow during this process.
7. If there's still zero response after 30–45 minutes on confirmed-good power, the battery or logic board likely needs professional diagnosis.
8. Avoid repeatedly force restarting for over an hour, since that wastes time without new information.

Tools and parts

When to call a pro

If the phone shows no response at all after an extended period on confirmed-working power, take it to Apple or an authorized repair shop for diagnosis.

Safety