Emax

I recently purchased an Emax SE/HD. It was working fine, I was able to 
access sounds on hard drive upon powering up keyboard. Now, It is 
stuck on 'loading software' upon powering up and will load a disk but 
I can't access the hard drive. Any ideas? I'm afraid it may have been 
affected by a power surge during a storm. Any ways to check it for 
problems or is there a manual specifically for the SE/HD that may help 
me? Thanks, Angelo