Keyboard can be divided into mechanical contact keyboard, capacitive keyboard and membrane keyboard according to the contact structure of keys, and capacitive keyboard is the most widely used one at present. I believe many friends have encountered water on the keyboard, especially those who climb the grid like us. They often tap the keyboard and drink water, and accidentally spill water on the keyboard. Here's how to "first aid" the keyboard after entering the water. We need to use two tools: a Phillips screwdriver and a hair dryer.

Generally, water enters the keyboard through the keycap. So the first thing to do after entering the water is to turn the keyboard over immediately and pour out the water in the keyboard.

Then turn off the computer, unplug the PS/2 plug of the keyboard, hold the keyboard in your hand and shake it a few times until no water drops fall out. Then put the keyboard flat on the desktop and blow dry the water left under the keycap with a hair dryer. If there is not much water, this step only takes about 1 minute.

Then lock the keyboard on the desktop, remove all the screws on the back of the keyboard with a screwdriver, and then open the bottom cover. At this time, we can clearly see the rubber contact under the capacitor film and the keycap. We should be careful now. Take off the capacitor film first, remove the rubber contact in the water inlet area, dry it with a paper towel, and then put it in. The reason why the hair dryer is not used here is because the air volume of the hair dryer is relatively large and it is easy to blow away the rubber contacts.

Put the rubber contacts back in place, and then deal with the capacitor film. The film is two layers of transparent hard plastic with some conductive contacts printed on it. When the upper and lower layers touch, a signal will be generated, indicating that a key has been pressed. If water enters these two layers of hard plastic, the conductive structure is temporarily destroyed, and the keys in the corresponding area on the keyboard will not respond. Only when the water inside completely evaporates can the keys return to normal, but the process of evaporation is long.

We carefully peeled off the film, suspended the surface of the lower layer in contact with the rubber contact, and then heated it with the high temperature of the hair dryer. When we felt a little hot with our hands, we immediately replaced the hair dryer with a big windshield. When the temperature drops, we repeat the heating process ... about 8 times, and the water can completely evaporate.

The job now is to dry the water between the two films. In keyboards produced by some manufacturers, these two films are separated, and it is enough to blow dry them separately with a hair dryer and then combine them into one. However, the two membranes in keyboards produced by some manufacturers are not completely separated, and some places in the middle are stuck together. Because plastics and rubber are easy to age and become brittle over time. Be careful when facing this film, gently pick up the non-stick part with your fingers, and don't use too much force. Once an error occurs, the film may be deformed or damaged.

Blow-dry the four sides of the two films completely, then pack the films, then fasten the keyboard bottom cover, screw on the screws and pack them. As long as the water evaporates completely in the process of using the hair dryer, the keyboard can be used normally. Some friends may ask me, I just need to dry the water with a paper towel, and there is no need to heat it with a hair dryer. However, after my own practice, after I dried the water for the first time, there were still some buttons that could not be used, so I took them apart and heated them with a hair dryer, so I thought it would be better to dry them directly with a hair dryer.