Please try one of these solutions below:
- It might be a switch problem. Your keyboard switches are not soldered. Please try to change the defective switch to a working one.
- Please disassemble the keyboard and check whether the socket of the defective key is falling off or loose in the PCB. The maximum tensile force borne by the socket on the PCB is 5.5kg, which is likely to cause the socket to fall off the PCB due to too much force during switch replacement. When checking the socket, you can try inserting a piece of paper between the socket and PCB to see if there is a gap between the PCB and the sockets. (How To Disassemble Keychron QMK/VIA Enabled Keychron Keyboard)
If the socket has fallen or shifted out of place, you can try to solder it back to normal or contact us at support@keychron.com with a picture of the defective socket attached. We will check it out and try our best to help you with your problem.
- If the switch and socket have no problems, please test the defective key on VIA and shoot a video (How to do a key tester). Please click on the Test Matrix (this is the mode to see if every key works on the keyboard) when you are testing. We will have our tech team check out the problem and find a proper solution for you.