The Samsung S4 I959 suddenly won t turn on

Dear Samsung users, according to the situation you described, you can try the following: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 turn it back on, 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, text messages, **, etc.), and restore factory settings4

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

Samsung knows that we will provide you with high-quality solutions and answer your questions attentively, and hope to get your satisfactory evaluation.

I hope it can help you and I wish you a happy life!

Welcome to Samsung's Digital Services platform.

Hello: According to your description, there are many factors why the mobile phone cannot be turned on, and the battery, mobile phone software, and hardware will cause this kind of non-boot failure. We recommend that you try the following:

1. Replace a mobile phone battery of the same model for testing or send the battery to the nearest service center for testing (preliminarily rule out whether the battery voltage is too low and the cause of low power protection).

2. Take out the battery, clean the metal contacts of the battery with an eraser and test it (preliminarily rule out whether the battery is in poor contact with the mobile phone).

3. Take out the SIM card and SD card at the same time, and then press the power button for more than 10 seconds to test whether it can be turned on.

Samsung S4 has a black screen and won't turn on, which may be due to a system crash or hardware failure.

Users are recommended to try flashing their phones by themselves to recover phone system issues.

Then in recovery mode, you want to shut down first, press the volume on and the power button until the recovery interface appears.

Before flashing, you need to double wipe, in fact, it is to clear the data, cache, and restore it to the exit mode.

Select the fifth option, install zip from sdcard.

The phone will automatically execute the flashing procedure, and the phone will automatically enter the system when the flashing is completed.

If the flashing cannot be completed or the system cannot be accessed after flashing, it is likely that the hardware is faulty, and it is recommended that the user send the mobile phone to the brand's customer service for testing and repair.

1. The boot line is abnormal: use an external power supply to supply power to the mobile phone, use the electric meter to detect whether the indication has changed, if there is no change, it is likely that the boot line is broken or the boot button is not in good contact.

2. The power supply circuit of the battery is abnormal: use the external interface to supply power to the mobile phone, see if it returns to normal when it is turned on, if it is normal, it is determined that the power supply circuit of the mobile phone is abnormal.

3. The IC of the mobile phone power supply is abnormal: test the test point of the peripheral circuit of the power supply IC according to the circuit schematic diagram to see whether the test value is normal.

4. The system clock and reset of the mobile phone are abnormal: you can use the dual total oscilloscope to detect the CPU power supply of the mobile phone to check whether the waveform in the reset is correct.

5. Problems with logic circuits: that is, faults in the circuit version of mobile phones, which can generally be solved by repair welding.

6. Software conflict: The installed software does not match the system of the mobile phone, which may also cause the mobile phone to fail to boot, you can connect the mobile phone to the computer to delete the program.

7. If it is a copycat mobile phone, then I estimate that it can't be turned on because the chip inside is burned, or some of the small parts inside are loose, but this situation will only appear if you drop it, the chip burns may be because you charge it for too long, burn the chip, if the battery has electricity, that is these aspects, if it is a brand-name mobile phone, such as Nokia, Motorola. These situations are rare, unless it is artificial, if it is a brand-name smartphone, and it is not used improperly, it is a software problem, it may be a system crash, or because of the mobile phone poisoning caused by software damage, generally this can only go to the maintenance office, however, I think the biggest possibility is caused by static electricity, it is recommended that you do not open the blind repair, or go to the maintenance office!

When the power is sufficient, turn off and restart, replace the battery and replace the socket. Let's change the charger to a new machine.

Samsung i9502 mobile phone flashes into the mobile phone system by itself: 1. In order to understand and solve the problems of the mobile phone in a more targeted manner, it is recommended to send the mobile phone to the nearest Samsung service center for testing, and the service center will determine the specific problems of the mobile phone according to the test results and further deal with them. 2. It is not recommended to operate by yourself to avoid the expansion of the problem.

Hello !

According to your description, the problem with your phone does not have to be flashed.

We recommend that you try it by following these steps:

When the device is fully charged, press and hold the [Power Button] and [Volume +] buttons for 10 seconds with the device off (off).

After entering recovery mode, move the cursor with [Volume+], Volume-] (see figure below).

Operate 2-wipes again

Select Wipe Data Factory Reset > yes, home] to confirm.

Select wipe cache partition > yes , home] to confirm.

Select reboot system now > yes , home] to confirm.

After doing so, restart and you're done.

If the problem persists after 2-wipes, it is recommended to press and hold the [Power Button] and [Volume +] buttons for 10 seconds to enter Odin Mode

Connect to your PC and flash the i9502 official ROM repair system.

Hope this helps you!!