reason
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1. Maybe the keyboard is dead. Press the CapsLock key on the left side of the keyboard to see if the Caps light on the keyboard indicator is on. If it can be lit, it means that the hardware of the keyboard is likely damaged. If it cannot be lit, check whether the keyboard is in good contact with the computer host port.
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2, it is possible that the computer system is processing a large amount of data causing the system to be in a state of suspended animation, then restarting the computer may be able to solve the problem.
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3. Check the driver problem. The driver was deleted by mistake. Because the driver of the keyboard is the operating system comes with it, so the driver can be easily restored after removal. Open the Device Manager and find the keyboard options.
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4. There may be a conflict between other software installed and the keyboard driver. In this case, you can press F8 while booting, go to the advanced options and click \"Last good configuration\" to restore the computer configuration.
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5, hardware problems, that is, the keyboard itself. First check that the keyboard cable is not damaged or disconnected. If any damage can be attached. If your keyboard is wireless, check to see if it's out of power or if the transmitter is set up improperly.
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6. It may be a software problem. There is now some software that can mask the keys of the keyboard, no matter which key is pressed. Because this type of software is usually not displayed in the system tray, you need to open the task manager and look for suspicious processes one by one in case of such software.
Cause analysis and investigation:
1. Mechanical keyboard qwertyu, the solution can not be used as follows.
2. The key of the keyboard is now a one-time punch, can not be replaced... The keyboard has expired and needs to be replaced.
3. There is also a temporary method to try: the computer power off, and then turn the keyboard upside down, near the faulty key, beat the hand several times, not beat a single key, but beat the key with the palm of the hand and the surrounding together, and then put the keyboard computer boot, and then experiment whether the faulty key can be used.
Cause analysis and investigation:
The computer can not type, the input method can not type is caused by the computer system is infected by the virus Trojan, such as the input method Trojan virus, you can use anti-virus software to kill anti-virus.
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Press F8 to enter the safe mode and exit, select Restart or Shutdown to enter the normal mode (repair registry).
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If the fault is still the same, please use the system with the system restore, restore to the time when you did not have the fault repair (if the normal mode recovery fails, please boot press F8 to enter the safe mode to use system restore).
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If the fault persists, use the system disk to repair the fault. Open the command prompt, enter SFC \/SCANNOW (there is a space between SFC and \/), insert the original system disk to repair the system, and the system will automatically compare and repair the fault.
The keyboard may have been flooded and burned out.
The keyboard may have been flooded and burned out. Take a look at the following picture: The keyboard line is very thin, and it is easy to corrode after entering the liquid, resulting in a break. As we can see, qwertyuiop and so on are all on the same line, and if there's a little bit of a break, these keys won't work.
May make this area of the circuit board damp, you have the ability to open and wipe clean. Otherwise it has to be replaced