Mark Levison no.36 has no lights at all when powered

I own a Mark Levison amp and found out today that there is no lights at all when powered today.
Please anybody know the reason?
Thank you for your help.

maybe the 'bulbs' are burnt out!
I mean the whole unit has no lights at all. 
i would think that if your unit works, it must be a 'bulb' issue!
The No. 36 is a DAC not an amp but if it has no lights and not working at all check the fuse.  If it is still working but no panel lights then the LED's need replacing.  Contact the Service Center and ask them.
Thank you very much for your input. The fuses just keep burning out. I have changed 4 fuses. 
Your amp has a serious problem get it fixed before it blows up.