Keyboard key failure, this phenomenon is generally because of the circuit board or conductive plastic dirt, so that the two can not be connected normally. Other factors may also be possible, such as: keyboard plug damage, circuit problems, motherboard damage, CPU operation is not normal, but not the main reason. Therefore, only the scale removal work is needed.
The operation steps are as follows (note that scissor foot keyboard is mainly used for notebook type keyboard, and do not disassemble it when pressing keyboard has been modular for personal maintenance, otherwise it cannot be installed back):
1. Disassemble the keyboard. Note that when opening the keyboard, it is necessary to push the button surface (that is, the side we operate) down and the circuit board is upward, otherwise the conductive plastic on each key will fall off in succession, which will cause trouble for your repair.
2. Turn over the circuit board. The circuit board is generally made of soft plastic film, and it is engraved with key line. It is better to use 97% alcohol cotton or 75% medical alcohol cotton to gently wipe on the circuit board. For the circuit of the key failure part, it needs to be wiped several times.
3. Check the conductive plastic of the key failure part. If there is a large amount of dirt on the area, use alcohol to wipe it. If the conductive plastic is damaged, it is recommended to replace the conductive plastic on the unusual key to the damaged part. Although this measure can not make the keyboard play all functions, it can at least extend the life of the common key.
4. Remove the dirt in the corner of keyboard. The tools can be used with brush and brush, but the action should be gentle.
5. Check whether there is any false welding or welding off of welding module. If you will use electric soldering iron, repair welding can be carried out. Of course, this step is only applicable to friends who can use electric iron, and those who will not use it. Please skip this step.
6. After the keyboard is installed, it is necessary to pay attention to it. That is, it must be carried out after the alcohol is evaporated.
