You picked up an iPhone, but it suddenly turned off and didn't respond to the power button or the charging? Or maybe the problem was a Xiaomi smartphone that stopped turning on after a fall or update? These situations are scary, but in 80% of cases the device can be brought back to life without going to the service center. In this article, we will analyze all possible causes — from a dead battery to hardware breakdowns — and give step-by-step instructions for each scenario.
It's important to understand that the recovery algorithms for iPhone (with its closed iOS ecosystem) and Xiaomi (based on Android) are fundamentally different, we'll look at both cases separately, and we'll also tell you how to diagnose a problem if you don't have a second phone or computer at hand. Don't panic: even if the screen is black, it doesn't always mean "brick."
Why the smartphone does not turn on: top-7 cause
Before trying to reanimate a device, you need to understand what went wrong, and here are the most common reasons why an iPhone or Xiaomi might refuse to turn on:
- 🔋 Full battery discharge – especially important for older models, where the battery loses capacity.
- ⚡ Charging problems: faulty cable, adapter or dirt in port Lightning/USB-C.
- 💻 Firmware failure after a failed update (often found in Xiaomi when manually flashing through Fastboot).
- 📱 Hardware failure: falling, moisture, overheating or failure of the motherboard.
- 🔄 Logo getting stuck (bootloop) – the device tries to boot but cycles to reboot.
- 🛠️ Incorrect repairs: for example, after replacing the battery or screen in an uncertified service.
- 🔒 Activation Block (iPhone only) – if the device was restored via iTunes without decoupling from iCloud.
If your smartphone is not responding to charging, check the power supply first, connect the phone to another adapter, or try charging from your computer via the original cable. For iPhones, it is important to use certified accessories - cheap Chinese cables can not only not charge, but also damage the power controller.
⚠️ Warning: If the phone overheated before the shutdown, groined or artifacts (strips, flickering) appeared on the screen, do not try to turn it on yourself. This may be a sign of a short circuit on the board - further manipulations will aggravate the breakdown.
iPhone does not turn on: step-by-step recovery instructions
Apple devices have several unique recovery modes that help bring the phone back to life.
1. Forced reset (Hard Reset)
This method works if the iPhone is stuck on a black screen, but the battery is not discharged.
- 📱 iPhone 8 and newer (including iPhone 15): Quickly press and release volume increase, then decrease volume, then hold the side button until the Apple logo appears.
- 📱 iPhone 7/7 Plus: Hold the volume button down + power-up 10–15 seconds.
- 📱 iPhone 6s and older: Hold the Home button" + power button before the logo appears.
If after a forced reboot the phone turned on, but immediately turned off again - the problem is most likely in a discharged battery or a faulty power plume.
2.Recovery Mode (Recovery Mode)
If your iPhone doesn’t respond to Hard Reset, try to reflash it via iTunes (on macOS) or Finder (on Windows).
- Connect your phone to your computer with the original cable.
- Launch iTunes (Finder on Mac with macOS Catalina and newer).
- Perform a forced reboot (as in the previous paragraph), but do not release the buttons until the image of the cable and computer appears on the screen.
- A window will appear in iTunes that says "Update" or "Restore" and select "Update" (this will save your data).
If the process is interrupted by an error (e.g., Error 4013 or Error 9), this may indicate a hardware problem, such as damage to the plume or power controller.
Check the cable and port USB computer-based|Reinstall. iTunes/Finder|Try another computer.|Update. macOS/Windows last-minute|If nothing helps, contact the service.-->
3. Mode DFU (power-user)
DFU (Device Firmware Update is a deepest recovery that allows you to reflash even the "brick." In this mode, the iPhone does not load iOS, only firmware. Instructions for iPhone 8 and newer:
- Connect the phone to the computer.
- Press the volume up quickly, then decrease the volume.
- Hold the side button for 10 seconds (the screen will go out).
- Without releasing the side button, press the volume reduction for another 5 seconds.
- Release the side button, but keep holding down the volume until iTunes detects the device in mode. DFU.
iTunes will see a message saying, "iTunes has detected iPhone in recovery mode." Now you can flash the device. DFU Deletes all data if there is no backup in iCloud.
Yeah, a few times.|Yeah, but I turned on after charging.|No, never.|I don't know, this is my first iPhone.-->
Xiaomi is not included: recovery algorithms
Xiaomi smartphones (including Redmi, POCO) More likely to suffer from firmware problems than hardware breakdowns. If your Xiaomi doesn't turn on, follow this plan:
1. Checking of charging and battery
The first thing to do is make sure that the problem is not the food:
- ⚡ Connect your phone to the original charger for 30 to 60 minutes, and even if the indicator doesn't burn, the battery could run out of power".
- 🔌 Try a different cable and adapter (preferably with Quick Charge support for Xiaomi).
- 🔋 If after an hour of charging there is no reaction, try connecting the phone to the computer - sometimes USB-The PC port gives enough current to run.
- 💡 Turn on the flashlight and light up the port. USB-C — If dirt or oxidation is visible inside, clean it gently with a toothpick (not a metal object!).
If when connecting to charging the phone vibrates or lights up the indicator, but does not turn on – the problem is in the firmware or bootloop.
2. Hard Reset (Hard Reset)
On Xiaomi, the forced reboot is done as follows:
- Hold the power button + increase the volume at the same time for 10-15 seconds.
- If the screen is black, try the power button combination. + volume-reducing.
- Some models (e.g. Xiaomi Mi) A1/A2) Only the power button (hold on) is working. 20–30 seconds).
If after Hard Reset the phone hangs on the Mi logo, this is a sign of damaged firmware - you will need to flash through Fastboot.
3. Fastboot mode and flashing
If Xiaomi doesn't turn on, but the computer detects it in Fastboot mode, you can try reflashing the device.
- Download the official firmware for your model from the Xiaomi Firmware website.
- Unpack the archive and install the Mi Flash Tool drivers.
- Connect your phone to your PC by holding the power button + Volume reduction (a screen with a rabbit in its cap should appear).
- Launch the Mi Flash Tool, select the firmware folder and click "Flash".
| Xiaomi model | Combination for Fastboot | Features |
|---|---|---|
| Redmi Note 10/11 | Power + Volume reduction | Sometimes you have to wait 30 seconds. |
| POCO F3/F4 | Power + Volume Increase | It may not work with unoriginal cables. |
| Mi 11/12 | Power + both volume buttons | The latest version of Mi Flash is required. |
| Redmi 9/9A | Nutrition + Volume reduction (15 seconds) | Often you need to log in to your Mi Account. |
If the Mi Flash Tool is running a "Couldn't load device" error, check:
- 🔌 Connection to USB 2.0 (some models do not work with the USB 3.0).
- 🛠️ Are Qualcomm or MediaTek drivers installed (depending on the processor).
- 🔒 Disable the antivirus – it can block the firmware.
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If Xiaomi is not defined in Fastboot, try holding the power button for 30 to 40 seconds, then immediately connect to the PC. USB.
Diagnostics of hardware problems
If none of the software methods worked, the problem is probably hardware.
1. Battery check
Symptoms of a faulty battery:
- 🔋 The phone is switched on only from charging, but turns off when the cable is disconnected.
- ⚡ The swelling is then turned off (and then turned off).
- 📉 Battery discharges within 10-15 minutes after disconnection from the network.
- 🔥 The phone is warming up in the battery area.
For iPhone, you can check battery status via iTunes (Battery Status tab). For Xiaomi, use the engineering menu:
##4636##Select Battery Information and look at the health setting. If it's below 70%, the battery needs to be replaced.
Checking for physical damage
Check the phone for the presence of:
- 💧 Traces of moisture (oxidation on the board, corrosion in ports).
- 🔧 Cracks on the body or screen (may damage plumes).
- 🔥 Battery darkening or bloating (dangerous! don't turn on the device!).
- 📶 Lack of response to PC connection (may indicate damage) USB-controller).
⚠️ Warning: If the phone smells like a burn or if there are black spots on the board, it's a sign of a short circuit. Further attempts to turn it on could lead to a fire!
3. Motherboard test
If the phone doesn’t respond to anything, but you’re sure the battery is working, the problem may be:
- 🔌 Power controller (frequent problem after falls).
- 📱 Processor or RAM (symptom: phone warms but does not turn on).
- 🔄 Power button plume (if the phone is charging but does not respond to the button).
To diagnose the board, you need a multimeter and experience with electronics. If you do not have one, you should contact the service. The average cost of diagnosis in Moscow is 500-1000 rubles.
What to do if your phone falls into the water?
When do I contact the service center?
There are situations when self-repair is impossible or dangerous.
- 🔧 You have followed all the instructions in this article, but the phone is not showing signs of life.
- 🔥 On the board, darkening, swollen capacitors or traces of burns are visible.
- 💦 The phone got into the water and after drying it does not turn on.
- 📱 The screen flickers, shows artifacts or doesn't respond to touch.
- 🔒 The iPhone says, "iPhone is disabled. Connect to iTunes" (iCloud unlock required).
The cost of repair depends on the problem:
| Type of breakdown | Average price (ruble) | Duration of repairs |
|---|---|---|
| Battery replacement | 1 500 – 4 000 | 1-2 hours |
| Repair of the power controller | 3 000 – 8 000 | 1-3 days |
| Flashing after failure | 1 000 – 2 500 | 30-60 minutes |
| Recovery from water | 5 000 – 15 000 | 3-7 days |
| Replacement of motherboard | 10 000 – 30 000 | 5-10 days |
For iPhones, you should choose Apple authorized service centers, which give a warranty for repairs and use original parts. Xiaomi will be suitable for official partners (Mi Service) or proven workshops with good reviews.
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If the phone is warranty, don't try to repair it yourself! opening the case or flashing the warranty will void.
Prevention: How to avoid repeated problems?
To prevent your iPhone or Xiaomi from shutting down suddenly, follow these guidelines:
- 🔋 Don't discharge your phone to zero. Optimal charge level is 20 to 80%.
- ⚡ Use original or certified chargers.
- 📱 Update your firmware regularly (but not through beta versions!).
- 💧 Avoid overheating (do not leave your phone in the sun or near the battery).
- 🔄 Once every six months, make a reset to the factory settings (preliminary saving data).
- 🛡️ Install a depreciation case and protective glass.
- 🚫 Do not install custom firmware (such as LineageOS) unless you are confident in your skills.
It is especially important for Xiaomi not to interrupt the upgrade process. If the phone suddenly turns off during firmware, this can lead to a complete loss of functionality.
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To extend the life of the iPhone battery, turn on the function “Optimized charging” in Settings → Battery → Battery status.