Emax

hi,

been using my emax 1 rather heavily lately, and something has gone  
wrong: last time, after loading a bank from a floppy, the machine shut  
down, and wouldnt reboot. after leaving it alone (and unplogged) for a  
few hours, it started up again. then randomly shutdown about 5 minutes  
later, while playing.

any idea whats caused this to spontaneously happen? any tips on what i  
can do to reset it or make this stop?

im at a total loss!

thanks,
peter