1. Force a restart by holding down the power button
Before thinking about anything more serious, rule out a simple system freeze. Hold down the power button for 10 to 20 seconds without letting go at any point, even if the screen stays black and nothing happens during the first few seconds: on many Android phones it takes that full amount of time to force a shutdown and let the system restart on its own.
If that doesn't get any reaction, check whether your model uses a different combination:
- Android (most models): hold down the power button for 10 to 20 seconds.
- Some Android phones with power + volume button: hold down the power button and the volume-down button together for 10-15 seconds.
- iPhone with Face ID (iPhone X onward): quickly press and release the volume-up button, then quickly press and release the volume-down button, and hold down the side button until the Apple logo appears.
- iPhone with a Home button (iPhone 8, SE and earlier): hold down the power button and the Home button together.
If after the forced restart the phone reacts — it vibrates, the logo appears or the screen turns on — the problem was a system freeze and it's already solved. If it's still completely black with no reaction at all, continue to the next step.
2. Check whether the phone is at least charging
The next step is to find out whether the problem is with turning on or with charging, which isn't the same thing. Connect the phone to a cable and charger you know for certain work properly, and leave it plugged in without touching it for at least 15-20 minutes. When the battery has run completely flat, the phone can take a while to show any sign of life before it's able to start up.
During that time, watch for a battery icon or a lightning bolt appearing on the screen even for just a few seconds, notification or charging lights coming on (if your model has them), a slight vibration when you plug it in, or the phone warming up a little when connected, which suggests it is receiving power.
If you notice any of these signs, that's good news: the phone is receiving charge and the problem is probably software- or screen-related, not the battery or the power supply. If you see no sign at all, don't jump to conclusions yet: continue with the next steps before assuming it's something serious.
3. Try another cable, charger and outlet
If you didn't notice any sign in the previous step, before suspecting the phone itself, rule out the charging accessories as the cause. Swap out these three elements one at a time:
- The cable: cables wear out on the inside without it showing on the outside, and they're the most common cause of charging failures.
- The charger: try another adapter, ideally from a well-known brand and with power output similar to or higher than the original.
- The outlet or power socket: plug the charger into a different outlet to rule out an electrical problem with that specific socket.
Leave the phone connected for another 15-20 minutes with the new combination. If no sign appears with any cable or charger, that's an indication the problem may be in the phone itself — the charging port, the battery or the board — rather than in the accessories.
4. Did it fall, get wet or take a hard knock right before?
Think about what happened right before it stopped turning on. If the phone fell, took a hard knock, came into contact with water or another liquid, or was exposed to a lot of heat or cold right before the screen went black, that's an important clue: it points to physical damage to the screen, the battery or some internal component, not just a software glitch.
If it was a knock or a fall, check whether the casing is warped, the screen is cracked, or the battery is swollen (a slight gap between the screen and the frame is a typical sign). If it got wet, don't keep insisting by connecting it to the charger or turning it on again and again.
5. Try starting in safe mode or recovery mode
If the phone shows any sign of life — it vibrates, a light comes on or the logo appears for an instant, even if it doesn't fully start up — it could be a software issue that's fixed by entering safe mode or the system's recovery mode.
How to access these modes varies a lot by brand and model, and there's no universal button combination that works on every phone: each manufacturer uses its own. Before trying, look up the exact combination for your specific model on the web or the manufacturer's support page. Trying the wrong combination usually won't damage the phone, but it won't help either if it's not the right one.
If you can't get into any special mode and the phone still shows no signs of life after trying everything above, move on to the next step.
6. When to take it to a repair shop
Take the phone to a repair shop, without continuing to try at home, when:
- No sign of life appears at all — no lights, no vibration, no warmth, no battery icon — after several hours connected to a charger you know works.
- The phone got wet or took a hard knock right before it stopped turning on.
- You notice the casing is swollen, warped or very hot while it isn't charging.
- You've already tried other cables, chargers and outlets, and a forced restart, with no results.
In these cases, continuing to try to turn it on yourself usually doesn't fix anything, and if the damage is hardware-related — battery, motherboard or screen — the sooner a professional looks at it, the better your options and repair cost will be.