How to fix A20 Error when starting the computer

Error A20 Error appears when the Power On Self Test (POST) process occurs automatically after the computer is started. The operating system is not loaded when this A20 Error appears.

A20 Error messages often appear in many ways, but usually:

 A20 

 Error A20 

 A20 Error 

What causes the A20 Error error?

Error A20 Error is reported when it detects problems with the keyboard or keyboard controller placed on the motherboard. Although the A20 error may be related to something else, often this happens very rarely. In short, just see the A20 Error, think about the keyboard.

How to fix A20 Error?

Turn off the computer if it is on.

If using a USB keyboard, try changing the connection port.

If using a standard keyboard, remove the keyboard connector (connector) that is connected to the case.

Check to see if the pins on the keyboard connector are curled and if so, try to gently fix it. Clean plugged dirt on the connector pins. Use a paper clip or pen to bend the pins to a position where you feel more straight. Then try plugging in the keyboard again.

Check if the pins on the keyboard connector are broken or burnt. If so, you must replace the new keyboard.

Check the connection port on the computer that you use to plug the broken, burned keyboard. If so, this port cannot be used anymore. Although the keyboard connection port is on the motherboard, you do not need to buy a new motherboard to fix the A20 Error error but just buy a USB keyboard instead.

If the above steps haven't found the error yet, try installing another keyboard that still works in the machine and try restarting. The A20 Error error disappears, indicating that the keyboard is broken, buy another one instead.

As a last resort, if the keyboard, the jack, the connection port are no problem, there may be a problem with the keyboard driver on the motherboard. In this case, only replacing the motherboard can solve the problem.

Also, check that the control chip is in the right place, try pressing it slightly deeper.

Error A20 Error applies to

This error applies to any keyboard hardware. The operating system is not related to creating this error message. Therefore, you may experience A20 Error on any Windows operating system such as Windows 10, Windows 7, 8 / 8.1 or Windows XP.

Note: Some software may use the A20 error code for cases that are not related to the keyboard. Stan is an example, it reports an A20 error when the video cannot stream.

See more:

1. Top 11 best wireless keyboards for Mac and PC
2. Fix keyboard error not working on Windows 10
3. How to fix typed keyboard errors when entering content