Akai S1000 / S1100 samplers

Hi,

I just got an s1100 with an internal hard drive... unit looks like it 
has been taken care of but I can't get the thing to power on.  I opened 
it and noticed that the power supply's little red light lights on when 
I connect it to the wall.. but that's it.  It doesn't do anything when 
I press the switch.  Does anybody know what it could be?  I know it can 
probably be the switch, but anything else?

Thanks!