How to deal with the touch screen failure of Xiaomi 4C mobile phone

If the phone has a situation where the touch screen is not sensitive and malfunctions, it is recommended:

1.Check if the phone has a film, if there is a suggestion to cancel the screen film and try it.

2.If the touch screen of the mobile phone is completely malfunctioning, it is recommended that you restart the machine and observe it again.

3.Try to update the system version of your phone (Note: Please back up the data in your device before upgrading).

4.If it doesn't work, back up the data in your device (contacts, text messages, **, etc.) and try to restore factory settings.

Xiaomi Mi 4 is a mobile phone released by Xiaomi very long ago,It was launched in about 2014,Many people will encounter the sudden failure of the touch screen when they use Mi 4,What should I do if the touch button under the Mi 4 mobile phone fails?

1. First of all, we open the My Device Settings page of Xiaomi mobile phone, find the "All Parameters" button on the My Device page, and click to enter the All Parameters page.

2. Then, we find the "Kernel Version" button on the All Parameters page, and click the Kernel Version button three times in a row to enter the engineering mode.

3. After we enter the engineering mode page of Xiaomi mobile phone, we find the "Single Test" button on the Engineering Mode page, and click to open the Single Test page.

4. Then, we find the "Touch Screen" test button on the single test page, and click to start the touch screen test.

5. The touch screen test requires us to slide our fingers towards the red box by pressing the blue circle, and (as shown in the figure below) the whole test needs to slide six times.

6. If we show that the test is successful, it means that there is no problem with our touch screen, and if our touch screen test fails or we still fail after the test is successful.

8. Next, we cloud back up the mobile phone data on the backup and reset page of the Xiaomi phone, and then, click on the factory reset below to restore the phone's system and data to the factory state.

9. If, in the end, the touch screen fails, then it proves that there is a problem with the hardware of the mobile phone, resulting in the occasional failure of the mobile phone touch screen, we directly take the mobile phone to the Xiaomi after-sales service point, and repair it.

The above is an introduction to what to do if the touch button under the Xiaomi Mi 4 mobile phone fails, if you encounter such a situation, you can refer to the method above, I hope it will be useful to you!

The reasons for the partial failure of the Xiaomi Mi 4C touch screen are:

The mobile phone screen was accidentally squeezed by a small area of hard objects, resulting in a liquid crystal molecular fault in this area of the screen, and this area could not be touched and displayed.

The mobile phone was accidentally damaged, fell to the ground, etc., and caused a slight detachment of the internal screen cable of the mobile phone, resulting in a small range of touch failure reactions.

Problems with the phone screen. There is a defect in the workmanship of the mobile phone screen, which causes the screen area to malfunction and the touch screen to partially malfunction.

Solution: If the touch screen is not working, you can use the electrons in the lighter to make a slight electrostatic conductivity treatment on the malfunctioning area, and keep the capacitive touch screen in the area electronically stable through trace electrons.

If it is an accidental backlog of hard objects on the liquid crystal molecule fault. As long as the phone is used normally for a period of time, the liquid crystal molecules will automatically replenish and remain intact, thus restoring the normal touch of the screen in that small area.

If you have experienced unexpected decline, you can go to the relevant after-sales maintenance shop for fault detection, if it is a cable problem, you can disassemble the cable and fix the maintenance.

If it is a screen problem, go to the official after-sales service for professional engineer testing, and if the screen is not a human problem, the relevant screen will be returned to the factory for repair and replacement procedures; Non-screen issues are detected for related failures.

There are many situations of touch screen failure, and it is recommended to take it directly to a mobile phone repair shop for repair. It can also be handled according to the following situations:

Method 1: If the mobile phone is connected to the computer with a data cable or there is a problem with the touch screen when charging, we need to check whether the data cable charger is original.

Method 2: Upgrade your phone to the latest version.

Method 3: Perform touch screen calibration, the operation is as follows:

Enter "*" in the dial screen to enter the hardware detection mode, and select Touch Screen Test.

2.Select Touch Calibration.

3.Start calibration, do not touch the screen after starting calibration until the calibration success prompt appears.

It can be solved by replacing the screen assembly.

The screen of Xiaomi 4C belongs to the laminated screen,It is a TFT screen that uses IPS technology,The partial failure of the touch screen may be a problem with the touch layer,The damage to the LCD screen of the mobile phone is irreversible,It can only be solved by replacing the screen。

According to the Xiaomi Mi 4c launch time 2015 September 22 release to calculate,Xiaomi Mi 4C should still be in the warranty period,It is recommended to send it for after-sales repair and screen replacement,The screen belongs to the warranty scope of the whole machine,You can enjoy a one-year free warranty。

Screen size: 5 inches.

Screen resolution: 1920x1080

Screen pixel density: 441ppi

The screen adopts technology: IPS display technology, supports eye protection mode, supports color temperature adjustment, and supports dynamic amplitude adjustment.

The screen of the Xiaomi 4c mobile phone is out of order, this is caused by an error in the system of the Xiaomi mobile phone, or the mobile phone screen is damaged due to external forces, and the mobile phone screen failure problem can be solved by the following methods:

1. Turn off the Xiaomi 4c phone, wait for it to restart, and check whether the touch screen of the phone can be used normally.

2. Factory reset the Xiaomi phone, after the Xiaomi phone is restored to factory settings, the data stored inside the phone will be erased, please make a data backup in advance to avoid the loss of important data.

The specific process of factory reset of Xiaomi mobile phone is as follows:

1. Take Xiaomi Mi 4C as an example, find the "Settings" option on the standby interface, and click to enter the next step.

3. Find the "Backup & Reset" option and click to enter the next step.

4. Find the "Reset All Settings" option and tap to open to restore factory phone settings.

3. If the above methods can solve the problems of the mobile phone, you can bring the warranty card, invoice, etc. to the local Xiaomi after-sales service center for testing and processing.

1. Cause analysis:

1. The failure of the screen is due to the local charge on the surface, which is commonly known as static electricity, which makes it impossible to judge whether there are fingers or other conductors (such as capacitive pens) pressed on it. Rubbing it in your pocket, pressing it vigorously frequently, dusty on the screen, sweating on your hands, or dry in winter with static electricity on the human body itself may cause partial charge of the screen.

When you press your finger to the nearby three touch keys or touch keys, the other hand malfunctions the touch screen when you touch it.

The reason for this malfunction of Xiaomi mobile phone touch is:

1. In actual use, you operate with one hand, press with your thumb on a distant screen, you actually have to press the palm three keys, without causing a touch response.

2. Capacitive touch screen is the only effective on human fingers. In addition to touchscreen phones, if there are deep scratches on the glass surface can cause contact failure.

3. Please enter *64663* test screen. No problem, the fault occurs when the Xiaomi phone touches in this case, there may be a reason for the system, the system is upgraded, if it comes to the touch screen driver, it is recommended that you do not draw the back after upgrading the old version.

I'm also a Mi 3 user, and I found that there are two problems that I solved by myself. The compass does not work and the handwriting does not work, these two problems are that I used a mobile phone case, and the material in the middle of its front is a steel plate, which may be magnetized, which affects the use of the mobile phone. I took off the phone case and it was good right away.

Hope it helps.

The most important thing is that the touch screen delay time is short and the screen is caused by static electricity, change the touch screen delay option in the settings to medium, and the upstairs said anti-touch, super sensitive off, it's good.

I can responsibly tell you that this is not a software issue. It's the touch screen that's wrong. You can take it to Xiaomi customer service after-sales service and change it to a new one.

Dial Input* * Click on the touch screen to test Press the menu to calibrate the touch screen again Click to start calibration Don't touch the screen Try a few more times Then restart It's good I just finished trying The touch screen is good.

At the same time, 9 Xiaomi Home in Beijing, Shanghai, Nanjing, Wuhan, Chengdu, Hangzhou, Xi'an, Shenzhen and Guangzhou have maintenance capabilities. Mi Home is open from Tuesday to Sunday, from 10 a.m. to 6 p.m. During the warranty period, non-man-made damage is completely free of charge.

If you don't have an outlet near you, please go to Xiaomi's official website.

What screen failure is a common thing,Xiaomi garbage said。