1, check the cell phone battery. There is a reaction when the mobile phone is turned on, which proves that the battery is still working. In addition to the aging of the battery, the battery problem can be eliminated.
If the battery is aging, you can try the same type of battery. If it can be turned on normally, then change a battery; If it is water, turning it on before the water is dry will lead to a short circuit of the battery, and the mobile phone will only be turned on for a while. The battery was damaged because of short circuit. You can wait for a day or two before trying to change a battery.
2. Check the phone screen. When the screen is damaged by external force, especially when some mobile phones are welded, it is particularly prone to "false non-startup" caused by the screen.
Although you just had a slight fall, the screen of your mobile phone is unresponsive due to the disconnection of the line. At this time, you can pat your mobile phone and take more photos. If the screen of the mobile phone flashes from time to time, it proves that the mobile phone is just a problem of a certain line. You can find the broken solder joint after disassembling it yourself, or go to the maintenance point for maintenance. Especially when the mobile phone is turned on, the vibration and sound are normal and the screen is unresponsive. This situation should be given special consideration.
3. Check whether you can enter the recovery and consider brushing the machine. This step is the detection method of software or system problems. In many cases, software or system problems will also cause the phone to fail to turn on.
If your mobile phone is stuck on the logo screen or can't operate just after it is turned on, then you should check whether the mobile phone can enter recovery. You can try to press the volume down+power button to start the machine and enter the recovery. Erase data/restore factory settings Erase data partition and restore factory settings. If you cannot access recovery, please continue with the following steps.
4. Can't enter the brush method of recovery. Brushing the machine is equivalent to an official mandatory upgrade, and the mobile phone can be operated as long as it responds.
The process of updating your mobile phone is simple. Go to official website to download the official upgrade package corresponding to the mobile phone, confirm that the update.app file exists in the dload directory under the unzipped folder, and then copy the whole dload to the mobile phone memory card, a clean and formatted memory card. When the phone is turned off, insert the S memory card, and then press the power button and the volume up and down button at the same time, the phone will be automatically upgraded, and the rest will be automatically restarted after the phone is upgraded.
When the Samsung mobile phone can't be turned on, you can check it according to the following steps:
1. Whether the on-off button is normal. If the button is damaged, please contact Samsung Service Center for repair.
2. Take out the SD card and SIM card, and then try to turn it on. Because there may be compatibility problems between electronic devices, it will affect the startup of mobile phones.
3. Please carefully clean the contact point between the mobile phone and the battery with a cotton swab, and check whether the contact point is damaged. Because the battery is not connected to the mobile phone, it can't be turned on.
Baidu experience