Buy a new battery and replace it. The reason is that the keyboard occasionally fails the most.

Avoid interference

Some instruments will interfere with the signal of wireless keyboard. The wireless keyboard is generally in the wireless frequency band of 2.4Hz, and some devices such as Bluetooth and cordless telephone next to the wireless keyboard will interfere with the signal of the wireless keyboard. Just move these devices to other places.

Standby mode

First of all, the user should check whether this kind of fault will occur when the wireless keyboard is just in standby mode. Then the standby mode occasionally fails.