1. Check whether the wired keyboard is connected to the host port, and whether the wireless keyboard is connected to the computer normally. 2. There is a problem with the power supply. It may be that the USB interface does not have data transmission. Try another USB interface. 3. The driver is faulty, just reinstall the driver or update the driver. 4. The keyboard is locked. Look at the numlock key in the upper right corner. If it is on, press it again. Supplementary note: The computer keyboard is developed from the typewriter keyboard. According to the number of keys on the keyboard, it can be divided into 101 keys, 104 keys and 87 keys. Some keyboards are fixed on the keyboard panel and base with plastic concealed hook technology, realizing the design of metal free screwing. Therefore, care shall be taken during disassembly to avoid damage.
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