What if the capacitive touch screen doesn't work?

The fundamental reason for the failure of the capacitive screen is that the screen is charged, and the current that should have flowed out of the finger does not flow out. The current flowing from the reference points at the four corners of the screen cannot be determined from which point, so as long as the charge can be balanced, the screen can be repaired. The following methods can be used for reference.

Option 1:

1, turn off the phone, take out the battery and let the phone stand for about five minutes.

2. Find a USB cable and try to connect it to the mobile phone.

3, wash your hands, or wet your hands (the key step, in order to better export static electricity).

4. When the hands are wet, the thumb of the same hand touches the metal part at the other end of the USB cable, and the index finger presses on the ground for about two seconds (initial shutdown).

5. When the back cover is removed, we can see that there is a small metal block next to the battery compartment, which is the mobile phone vibration generator, commonly known as vibrator. Because it is also directly connected to the main board of the mobile phone, we can do the same. When the hand is wet, the thumb of the same hand touches the vibrator and the index finger presses to the ground for about two seconds.

Option 2:

Remove the HD2 battery, power on the electric iron, press the sheets on the sheets at a moderate temperature, remove the electric iron, fasten the HD2 screen on the ironed sheets, and iron the screen cover (the temperature is still moderate, so it will not be repeated), and so on for about 5 times.

Option 3:

Blow the screen with a hair dryer, pay attention to the middle range, blow evenly, and feel that the screen is hot (note: remove the battery).

Scheme 4: scotch tape method.

When the tape is uncovered soon, a part of the charge will be taken away, just like the physical friction between the glass rod and the rubber rod in junior high school. In addition, the tape will stick away tiny dust, sweat stains, salt and so on on the surface of the screen, and these tiny things will also affect the charging of the screen, so I think you should be able to repair it by sticking it with tape several times. Key points of scotch tape method: 1, use the cheapest wide scotch tape, the thinner the better, use a new one, and don't let it stick to the screen. I use pure transparent, there is no need to use electrical tape;

It doesn't matter how big the tape is cut. I cut a centimeter horizontally (the size is almost 1cm×5cm).

3. It is recommended to turn off the mobile phone before sticking the tape, wipe it with clean cotton cloth or glasses cloth, and do simple cleaning. You can breathe through your mouth or use screen cleaner;

4. Smooth the viscose cloth by hand, try not to have bubbles or poor contact, and of course, don't press it hard;

5. Sticking the whole screen for several times when it is turned off, the estimated effect is not good. Then, use tape to open it, and use your hands to divide it from the good area next to the bad screen several times, and then suddenly tear it open.

6. Repeat the fifth step, paste it several times, paste the whole screen again, and then focus on the failed area and nearby areas. Then you will be surprised to find that when you rub the tape, the screen will react.