Try pressing FN + CAPS LOCK. From our user manual:
Quote:
The keyboard has non-volatile memory to save the backlighting level as well as the brightness mode of the Num, Caps
and Scroll Lock LEDs (status LEDs). There are two status LED modes. The first mode has the status LEDs dim along
with the backlighting LEDs of the keys. The second mode is a “daylight” mode in which the status LEDs remain bright
at all backlighting brightness levels - even if the backlighting is turned “off”. Please note that the status LEDs will dim
slightly as the backlighting levels decrease toward level 1. The status LED mode is toggled by pressing “Fn” followed
by “Caps Lock” key. Just as with the dimming operation, no “Caps Lock” key information is sent to the PC when the
“Fn” key is down. If the non-volatile memory fails, the default power-on settings are level 7 brightness and the status
LEDs dim along with the backlighting of the keys.