LFO 3 led

[3YL]

I just bought a Virus TI desktop. I've founded that on my model the LFO3 led (the white one) is permanently on at maximum brightness. The others two pulse regurarly indicating the LFO timing. I've tried to modify the settings in the global menu, but the result is that I can only affect the brightness of LFO1 and LFO2 led. The LFO3 led is still permanently on at maximum value. of course this is not patch dependant, is always on!
Is this ok or there is something wrong? it's a bit annoing, because this led is so bright that makes difficult to read the others things in the panel near him. Thanks in advance