Generally, any problem that arises with an Android smartphone can be solved from the smartphone itself, or from the Recovery menu in the worst case scenario. However, many users have found that their mobile phone it doesn't even turn on. Now what?
What happened to it?
First of all, you must identify what happened to you to the smartphone. If it's been underwater for two hours and it doesn't turn on, it's likely that it's never going to turn on again. But we're talking about those cases where, for example, some reason the mobile phone does not turn on, even though, in principle, it should turn on without problems.
First of all, remove covers or cases that may be pressing buttons and check if the device has bulging (possible damaged battery). If you notice swelling, do not connect it to the power supply and consult a technician.
- No signs of life: No vibration, no logo, no LED. This usually indicates a dead battery, a faulty charger/cable, a dirty port, or a hardware failure.
- It turns on but turns off: This could be due to an unstable battery, overheating, or a software failure after an update.
- Black screen: The phone may be on; check for sounds, incoming calls, or PC connectivity.
Can it be saved?
Unless you are very clear about what happened to him has no solution, such as leaving it underwater for two hours, there is a chance you can save your phone. Sometimes they occur electronic errors on smartphones that cause them to turn off to avoid a bigger problem. It is also possible that it is a battery calibration problem. And it's normal for a smartphone to need to be turned on in a special way.
Start with the basics: connect your phone to a charger and cable in good condition (better if they are official) and let it charge for at least 30 minutes. If the battery icon, is charging; a solid red light indicates a low battery, and if it's flashing, there isn't enough power yet to start. Also try another plug and, if your model allows it, the wireless charging to discard the port.
clean the loading port with isopropyl alcohol and a soft bristle brush, very carefully. If the port is damaged, the solution is technical service. When in contact with water or moisture, avoid rice and opt for silica bags or professional drying.
In case of overheating, let the device cool down. cool down before charging it or trying to turn it on. And keep in mind that some brands offer recovery software to reinstall the firmware automatically from a PC.
How to restart it?
The most normal thing is that there is a special ignition procedure for your smartphone, which includes a combination of buttons. You can find this by searching the Internet. Start by writing down what's happening with your smartphone, as it may have happened to other users and they may have already found a solution. The goal is to find that special power-on procedure that your smartphone has. Keep in mind that sometimes these procedures are complex. For example, I had to perform a special power-on procedure with the Motorola Moto G that included having to load the battery to 100% and then holding down two buttons for two full minutes without the smartphone turning on. It seemed impossible that this would work, but the truth is, it was the only way to turn the phone on.
Try one first forced restart: press and hold the off button between 10 and 20 seconds; on other models, Power + Volume Down. If it responds, release it when it vibrates or you see the logo.
If Android doesn't boot, try the recovery mode (usually Power + Volume Up, varying by model). From that menu, navigate with volume and confirm with power to: 1) Wipe cache partition (delete temporary files without losing data), 2) Reboot system now, and as a last resort 3) Factory reset (delete all).
If the system is damaged, the fastboot mode or EDL may allow you to reinstall the factory ROM from a PC. Connect the phone, install the USB drivers from the manufacturer and uses ADB/Fastboot to detect the device, flash the system or wipe data when it is not possible from Recovery.
Power button broken? Connect your phone to a PC while holding it. Increase or decrease volumeMany devices boot into Fastboot or Recovery, from where you can restart. If the button is damaged, see how to schedule automatic start game as an alternative.
If you suspect an app, start in safe mode (varies by brand). Disable downloaded apps and check. Then, restart normally and uninstall the offending app.
Be careful, it may be the screen: Call the phone, listen to notifications, or connect it to a PC. If it's on with a black screen, try a keyboard for OTG to enter the PIN or manage the phone from the PC with mirroring tools like scrcpy (if debugging was enabled). You can also use services like Find my device to remotely locate, lock, or erase and follow tips for prepare your Android.
Final tips to avoid relapses: do not exhaust the 0% battery regularly uses chargers quality, watch out what consumes the most battery, clean the charging port periodically and maintain the system updated when stable versions are available. If after all the above there is no reaction, there is probably a hardware failure (board, charging chip, battery) and a professional diagnosis will be required. With a valid warranty, it prioritizes the official service.
