MOTU 828MK3 led's flash then no lights do they have a switching power supply ?? Any one have a diagram of the unit

I have a MOTU 828 MK3 and have had trouble with the display lights not working on one of my units. I tried the unplugging and switching from 120 to 220 and back. Sometimes when I started it up it would come on and quickly go off or not even come on at all. I was using the unit by reading the numbers using a flashlight. One day I noticed the light undulating as if trying to come on and I just rubbed my finger over the light as if to try and coax it to come on. The next time I turned the unit on the light came on and stayed lit for the entire session. The light has only gone out one time since, after many sessions. The time it went out, I just rubbed the top of a finger over the display and it came on the next time the unit was started. I now make a habit of rubbing it every time I turn it on. It has not failed since. Sounds funny as it might just be my karma, but I think it more likely that it works because of a slight static charge that I create with the light rubbing of my finger. Just thought you might like to know. Doc Mason