What should I do if my Samsung phone won t turn on or off

1.Charge with a cable charge for a while and try to turn it on, or replace a phone battery of the same model.

2.Take out the SIM card and SD card at the same time and try to power on again.

3.When you see the "Samsung" logo icon when you reboot the device, press and hold the [Menu Key] (Left Touch-sensitive Button) until the word "Safe Mode" appears in the lower left corner of the screen, then let go, back up data (e.g., contacts, SMS, **, etc.), and restore factory settings.

4.If you can't enter the safe mode or the problem persists after operation, it is recommended to bring the three-pack certificate of the mobile phone and send the mobile phone to the nearest Samsung service center for testing and repair.

Friend, have you been using your phone for more than a year?

As long as Samsung's mobile phone is used for a long time, it will have lag and freeze.

The way I used to do this was to open the phone case, unplug the battery, and then put it back on. Now Samsung is no longer used, and domestic production is supported.

1.Check whether the battery is too low: Connect the phone to the original charger and charge it for a period of time and then turn it on.

2.Some machine batteries are removable, it is recommended to reinstall the battery and turn it on again. If it doesn't work, replace it with another original battery.

3.If the phone is stuck or unable to enter the system interface after turning on, please press and hold the power button for 8-10 seconds to restart the machine. If it is a built-in battery, please press and hold the power button and the down volume button at the same time for more than 7 seconds to restart the device.

If the problem persists, it is recommended that you bring the purchase invoice, warranty card and mobile phone to the local Samsung service center for professional engineers to help you test.

Hello, the following questions may arise:

1 Use a non-original charger data cable for charging, replace it with a new original charger for charging.

2 If the battery used is not original, replace it with a new original battery.

3 The battery is in a dormant state, and if you can remove the battery, charge the battery with a universal charge for 15 minutes to activate the battery.

4 Check whether there are any foreign objects on the charging port.

5 Charging interface problem.

6 Problems with the motherboard.

Repair method for Samsung phone problems:

If there is a problem with your machine, in order to understand and solve the problem in a more targeted manner, it is recommended to send the machine to the nearest service center for testing, and the service center will determine the specific problems, accessories and other hidden faults of the mobile phone according to the test results.

If the warranty period has been exceeded, the warranty conditions are not met, etc., the service center will give specific accessories and maintenance costs**.

Samsung S4 mobile phone appears that it cannot enter the system page after booting, appearsStuck screenCrashThe situation can be passedForce shutdown and restartandRemove the batteryTwo methods for repair and inspection.

Method 1: (Force shutdown and restart).

Press and holdPower buttonRestart the machine in 8-10 seconds.

Method 2: (Remove the battery).

Please take out the battery and insert it back in after powering it off.

If the problem persists after restarting the machine, it is recommended to bring the purchase invoice, warranty card and machine to the Samsung service center for inspection.