Previously when the light on the joystick flashed I updated the software for the onscreen display and it stopped flashing. Today I found it is flashing again so I checked for a software update on LG's site. There was an update yesterday so I updated. But when installing it my Macbook said it was merely replacing the software with the same version. The joystick light is still flashing. I unplugged the monitor and plugged back in but no difference. It's annoying. How do I stop it?