I can't see that light on my unit. However, I posted a picture in another thread and a couple other folks saw a light there. For some reason I can't see it in the picture or my unit.
I do see the light on the picture you posted.
On the other hand I keep my PW light at level 22 of 24 and that may raise the overall screen light to such an extent that the light now blends in and cannot be seen.