Emax

Hi i´m new in the emax stuff..recently I bought an Emax, serial 1000, 
PCb rev 2, Disk Drive working OK. The Symtoms: I push the ON Button, 
then it started going up, everything looks goes great "Loading 
Operating System" etc Etc...then Loading Bank, and finally showing the 
patch on the screen, I began to play a note...a sound....great...then 
another sound....great!!!! then suddenly the notes hangs up, and the 
system crash, no other button pushed works.....finally nothing works 
except the OFF Button. Someone with the same problem???, any idea about 
this cause??? 
Thanks in advance.

Richard