What should I do if my mobile phone can't be opened and I can't connect to the computer?

1. What if the phone can't be turned on and connected to the computer?

The phone can't be turned on or connected to the computer. The main reasons for this situation are as follows:

1, the boot line is not normal. Look: use an external power supply to power the mobile phone, and use an electric meter to check whether the indicator light has changed. If there is no change, it is likely that the boot cable is broken or the boot key is in poor contact.

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

3. Abnormal mobile phone power IC: Test the peripheral circuit of the power IC against the circuit schematic diagram to see if the test value is normal.

4. The system clock and reset of the mobile phone are abnormal: you can use the dual main oscilloscopes to detect the CPU power supply of the mobile phone to see if the waveform in the reset is correct.

2. The mobile phone can't be opened, and the data cable can't be connected to the computer. How can I brush the mobile phone?

First of all, determine whether your mobile phone has been swiped into recovery? ,? If not, you need to brush in the recovery to enter the recovery to brush.

Then we turn off USB debugging in the settings and copy the brush package to your SD card. ? Turn off USB debugging and read out the phone memory.

Then after entering the recovery mode, the buttons for entering the recovery mode are different. ? Some can enter recovery mode from computer control. Some press the power button and volume button to enter the recovery mode! ! ? Clear all data after entering recovery mode! ! Then we are clearing the cached data in the mobile phone! ! These operations can be adjusted up and down by using the volume buttons.

Make sure it's the power button! ! Then we are choosing the brush package and installing it on the SD card? ! ? So choose the brush package in the SD card! ! Our brush package is a ZIP file. Click to select a ZIP file from the SD card! ! Then select the file of the brush package and click OK! ! There will be a success prompt after the brush machine is successful. Then return to restart the system and enter the new system you brushed! .

3. How can I connect to the computer if my mobile phone can't be opened?

Android phone can't boot normally. Treatment method:

First press the power button 10 seconds or more to see if it can be forced to start. If it can be turned on, please back up important data and restore factory settings or upgrade the latest software version.

2. If you can't force the phone to start, please verify whether the phone has power. If plugged in, there will be charging instructions. If it is just charged, it may not start immediately. Please continue charging for a while, and then try to start.

Third, if it can't be recharged, please contact the after-sales service.

4. If there is a response when the phone is turned on, but it does not enter the system, it is recommended to enter recovery mode to restore the phone to the factory and try again (recovery mode entry method: press and hold down the power button to turn on the phone).

Apple's mobile phone can't boot normally. Treatment method:

1. Check the iPhone for physical damage, such as bending deformation or water ingress;

Second, charge the iPhone with the original data cable and charger, and check whether the iPhone responds. If the battery is low, it may not start.

Third, force the iPhone to restart;

4. If there is still no response after the above operation or it cannot be started normally, it is recommended to go to the local Apple official or authorize after-sales treatment.

The mobile phone can't be turned on and connected to the computer.

Isn't it common not to turn on the phone? The solution is almost fixed.

1. Check whether you can enter the recovery, enter the third-party recovery, and just brush the machine directly in the recovery mode.

2. If you can't enter the recovery, whether you can enter the recovery or not, you can enter the third-party recovery, and then continue according to step 1.

3. Can't brush recovery, try to brush the official firmware.

4. Directly link the rabbit brush machine, and brush it back to the official system with a line brush to save bricks.

5. If the above four methods can't successfully save the brick, it is recommended to go to the after-sales or professional mobile phone repair shop for repair.

5. Why can't the mobile phone connect to the computer?

The possible reasons are as follows:

1. The USB option of the mobile phone is incorrect. Trial operation: when the mobile phone is turned on, connect the mobile phone to the computer with a data cable, press the drop-down button on the mobile phone interface, select the "USB connection" option, and press "Open USB storage device" to realize the USB disk connection function between the mobile phone and the PC. If you still can't open it after the operation steps, try replacing the USB interface behind the main chassis to see if it can be connected normally, or try changing a USB data cable.

2. If you connect the computer to install the software synchronously, please try the following operation:

Turn on USB debugging mode and connect the computer. If there is no response, please open the computer device manager to see if there is a device driver with a yellow exclamation mark or question mark icon.

If not, it means that the computer cannot recognize the mobile phone. You can change the USB interface or computer, or clean the data cable interface, or try to change the USB data cable.

If the yellow exclamation mark or question mark icon is displayed, it means that the computer has recognized the mobile phone, but the correct driver is not installed. Use "360 Mobile Assistant" and "Pea Clip" synchronization software to install the driver, and you will be automatically prompted to install the driver when you use it for the first time. If it cannot be installed normally, it is recommended to try other synchronization software to automatically install drivers (such as 9 1 mobile assistant, QQ mobile assistant, etc.). ).

3. If the above operations such as replacing USB cable, USB option and driver are ineffective, it is recommended to check the mobile phone after sale.

6. The mobile phone can neither be turned on nor connected to the computer. What should I do?

If it is a S60 mobile phone, it may be a virus. If it is a S40 mobile phone, it will not be infected with the virus. S60 mobile phone, if it supports memory card, it is recommended to try pulling it out. If not, please check whether you can connect to the computer when it is turned off. Pay attention to whether the computer has the sound of connecting hardware. If there is no connected sound, it is better to send the mobile phone to be repaired. If there is sound but no mobile device, I suggest you right-click my computer, management and device manager to see if there are any unrecognized devices and find the corresponding solution according to the name. S40 The mobile phone is handled in a similar way, but if it is within the warranty period, it is recommended to send it directly for repair.

Supplement: According to what you said, there should be something wrong with the mobile phone program file. Again, the solution depends on whether your mobile phone is S60 or S40, because S60 mobile phone can brush program files by itself, and S40 mobile phone can't handle it by itself. If it is S60 mobile phone, it is recommended to try changing the data cable. If it is S40 mobile phone, it needs to be repaired within the warranty period. I hope the answer is useful to you.

7. How can I connect to the computer if the Android phone can't be opened?

You can use the following method to try whether you can force start according to the model.

Proces method for abnormal startup of Android mobile phone

Third, if it can't be recharged, please contact the after-sales service.

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