I'm running a Macbook Pro Retina Mid 2002 (El Capitan 10.11.6) connected to a MOTU 16a. The problem I'm having however occurs whether the monitor is plugged in or not. I only just bought these monitors and set them up yesterday (and they sounded fantastic). Today, when turning them on (without making any changes) the light on the front of one of the two monitors was red (instead of blue) and no sound comes out of it. The other monitor works just fine.
I have searched the forums, I have gone through the printed and online manual, and no where can I find even a mention of this light, let alone what having it turn red means or what I need to do to fix the problem(s)