Emax

Hi

I'm having a bit of a problem with my EMAX II rack.  When I go to turn 
it on sometimes it powers up just fine and other times it just makes a 
clicking sound with all LEDs blinking as well as the LCD blinking.  
It's very intermittent.  When it eventually powers up it stays on no 
problem. I can even turn it back off and it will turn on again.  It 
almost seems like it acts up after it sits for a long period being off.  
However, sometimes it works just fine for weeks.  I'm very confused.  
Has anyone ever encountered something like this? The clicking is coming 
from the power supply board.  

Thanks
Ray