If a Logitech wireless keyboard fails, remove the wireless receiver terminal from the computer's main case and reinsert it.
Turn on the power of the keyboard, select Bluetooth search on the computer, find the signal of the keyboard and then re-match the connection, establish the connection and then proceed to the next step, which is equivalent to installing the wireless keyboard and mouse again
Logitech wireless keyboard malfunction, possibly because the wireless keyboard battery is low, or because the keyboard is damaged by water. It is recommended that you replace the battery with a new one, and then put it under the sky to let the water evaporate.