If your function key on the 5Q keyboard is strangely lit, it's possible that the keyboard is in testing mode from our manufacturing facility. You can see this by pressing Control+FN, and the FN key will turn white. You can exit this mode by following these steps :
1. Press `Ctrl+FN` => `FN` lights white
2. Press `FN` => `FN` blinks white
3. Press `L-Ctrl` + `L-Alt` + `PrintScreen` (repeat this step twice)
Once you've done this, the `FN` key should have normal illumination.