What is the problem that the LETV mobile phone charging flashes three times and flashes three times

The situation you said should be that the battery is insufficient, try it with the original charger, and try again after charging for 15 minutes.

Mobile phone charging principle:

The battery is charged by the phone charging program and the power management chip.

MT6305N(U400) control.

When the phone is powered on:

1. When the charger is plugged into the charging IO port, the VCGG signal is sent to the power management IC MT6305, and the signal triggers the charging interruption signal CHRDET.

2. The CPU accepts the interrupt request, and then executes the charging program, displays the charging icon, and outputs the charging control signal CHRCNTL to the MT6305.

3. MT6305 outputs the control signal GateDry, turn on U405, and make it charge the battery.

4. MT6305 controls the charging state through the current detection signal iSense to detect the charging current and the voltage detection signal VBATSENSE to detect the battery voltage.

5. When the battery is detected to be fully charged, the MT6305 turns off the charging signal through the GateDry output, terminates the charging process, and the charging ends. When the phone is powered off:

When the charger is plugged into the charging IO port, the VCHG signal is sent to the power management IC MT6305.

The MT6305 detects the signal with the charging threshold level.

In contrast, when the charging signal level is higher than the threshold level, the signal will trigger the MT6305 to work normally, output each voltage, and generate a reset signal.

The Chrin signal will trigger the generation of a charging interruption signal that CHRDET sends to the CPU.

Press and hold the power button for 10 seconds to take a look at it Or replace the data cable and the charging head to see if it is a problem with the mobile phone charger If not, go to the after-sales service to test the mobile phone.

If you feel that the battery is insufficient, try it with the original charger and charge it for 15 minutes.

LeTV mobile phone has been charged for a long time, but it keeps flashing red light and can't turn on.

Hello dear<>

Sorry for your question. LETV mobile phone has been charged for a long time, but the reason why it keeps flashing red light and can't turn on is:1

First, you can try charging with the original charger and cable to make sure the power is stable**. Sometimes using a non-original charger may cause unstable charging and affect the normal booting of the phone. 2.

Secondly, you can try to press and hold the power button for more than 10 seconds to force restart your phone. Sometimes LeTV phones may have software conflicts or system errors that cause them to fail to boot normally, and Orange Cha can try to restore it to normal by forcing a restart. 3.

If none of the above methods solve the problem, you can try to do a hardware detection and repair of your phone. It is possible that the phone's battery is faulty or other hardware issues that prevent it from turning on properly. You can contact LETV mobile phone after-sales customer service or go to a professional mobile phone repair shop for repair and maintenance.

In short, when the LETV phone has been charging for a long time, but the red light keeps flashing and it still can't turn on, you can try to use the original charger, force restart the phone, or perform hardware testing and repair. We hope you find these suggestions helpful! If you have any other questions, please feel free to ask.

Good luck with your phone problem! I hope my answers can help you, and I wish you a happy life<>

To this problem, first check whether the charging head has a normal charging voltage. If the charging head has a normal output voltage, it means that the charging head is normal. After the above measurements are normal, then measure whether the charging data cable is connected to the poor touch or damage, if there is, then change the data cable.

If the above 3 items are restored to normal after inspection, but the fault is still the same, at this time, the problem is likely to be caused by poor internal contact of the mobile phone charging plug, or the failure of the charging protection circuit in the mobile phone, if this is the case, then you have to go to the mobile phone repair shop to let them help you deal with it.

Replug and unplug the charger, press and hold the power button after charging for a while to see if it can be turned on, if not, go to the after-sales outlet to check.

Can't turn on]:

1. Use a data cable to connect to the computer and charge for 30 minutes (it may enter a sleep state due to the power running out, and it needs to be activated).

2. Press and hold the power button for about 10 seconds to try to turn it on.

3. Replace the battery and eliminate the battery fault.

4. Press and hold the volume up, volume down and shutdown keys in the shutdown state, and let go when the boot screen appears, and you can enter recovery. Go to Recovery >Chinese >> Clear Data >> Erase all data).

Select Chinese Simplified and confirm, volume key select Power key confirm, select Will install to system and confirm.

Select Confirm, wait for completion, and select Restart to system to enter the new system.

5. If you still can't turn on the phone, it is recommended to send the mobile phone to the after-sales service for inspection and maintenance.

Press and hold the power button for 15 seconds to try, if it doesn't work, charge it for 15 minutes and try again, if it still doesn't work, go to the after-sales service.

Don't worry, wait for 15 minutes of charging and try to turn on the power button, if not, go to the after-sales service to check it.

1. It is estimated that it is caused by no power, charge for 15 minutes to see or change the charger to charge, first change the charger and try to press and hold the power button for more than ten seconds, if you can't open it, you can only go to the after-sales service.

2. Confirm that the blue tooth is in the shutdown state, press and hold the multi-function button for 2-3 seconds, the Bluetooth indicator red light flashes quickly about 3 times, and turn off the Bluetooth.

3. Bluetooth enters the pairing state, press and hold the multi-function button for 7-8 seconds, and the Bluetooth enters the pairing state, which is manifested as the red and blue colors of the indicator light flashing rapidly alternately or the indicator light is always on.

4. The red light is that the battery is low and the charging is orange, it is estimated that it did not rush in, it is recommended to change the charger to try.

Is it caused by a lack of power, charge it for 15 minutes to see, or change the charger to charge.

I'll try to charge more, and the red light will flash when there is no power.

In addition to the light on, does the mobile phone have a charging logo display?