What should I do if the Xiaomi Mi 4 touch screen fails and I can t turn on the phone

The harder you smash, the better.

1-First of all, comprehensively check the outer screen of the mobile phone for signs of falling or cracking, or water ingress.

2-If the outer screen has not been dropped, not cracked, Zenbi has not been flooded, etc., you can try to restart the phone or restore the factory settings, if it is still like this, just disassemble the machine directly to check.

3- If you have fallen and there are traces of cracked screen, please replace the outer screen. If you have fallen, but the screen is intact, and the screen is not working, directly disassemble the machine to find out the fault point.

4- The necessary parts for dismantling are as follows: dismantling screwdriver, suction cup, blade, anhydrous alcohol, camera, cotton, hot air dryer, small magnet, scratching piece, etc.

5- If you need to disassemble the phone to check the fault, first of all, the mobile phone should be turned off, if the battery can be removed, remove the battery first, and then allow the next step to disassemble.

6-During the disassembly, put the screws on the magnet for safekeeping, and then open the back cover slowly, and be careful about the fingerprint cable to avoid breaking and damaging.

7- After opening, take a picture with your mobile phone, in order to install it back when there is a mistake, you must take a picture, and then make a comprehensive visual inspection again to see if there is any loose wiring or damage and excessive dust.

8-If there is a loose cable, clamp it tightly and simply install it, install the battery, boot it to test, whether it solves the problem of the touch screen is not working, if there is any damage, solve it according to the degree of damage, and solve the small damage if you can solve it, and if you can't solve it, you can take it to the maintenance master to help deal with it, if there is too much dust, it has affected the normal operation of the motherboard, and immediately take out the motherboard to clean it up, and then install it.

9- Check whether the touch screen cable is damaged many times, and there is poor contact or moisture, aging, etc., which affects the touch screen. If there is any damage to the external screen cable, please replace the new external screen, if there is poor contact, disassemble and clean it and reinstall it, if it is wet, please dry it with a hot air dryer. If there is any aging that causes failure, please change the screen.

Xiaomi mobile phones have a good reputation in the market, but sometimes they will encounter some problems, such as the failure of the touch screen. What should I do? Here are some solutions.

Method 1: Clean up your screen and fingers.

Sometimes the touch screen fails because there is dust or dirt on the screen and fingers, in this case, you only need to clean the screen and fingers with a cleaning cloth. At the same time, you can also try to wipe it with a damp cloth with water or alcohol, but you need to be careful not to let the water or alcohol seep into the inside of the phone.

Method 2: Restart your phone.

Sometimes the touch screen fails because there is some problem with the system, and you can try restarting your phone. The method is simple, just long press the power button of your phone and select Restart. After restarting, the system will reload, which may resolve the issue of the touch screen malfunctioning.

Method 3: Check the screen protector.

Sometimes the touch screen fails because the screen protector is aged or damaged, and this is the time to check the screen protector. If you find that the screen protector is aging or the hail socks are damaged, you need to replace it with a new one. If you don't have a screen protector, consider buying a new one to use.

The above three methods can solve the problem of most Xiaomi mobile phones having their touch screen malfunctioning. If none of the above methods can solve the problem, it is recommended to contact Xiaomi's official customer service or go to a professional mobile phone repair shop for maintenance.