alesis quadraverb gt

[kaliyuga]

Hi
my alesis quadraverb gt has gone crackly on some effects, happened after I tried to use the sampling
has anyone any idea of what the problem could be or know where i can get hold of a schematic for it
Thanks

 

[kaliyuga]

...

Anyone? I am still waiting!
turns out its most likely the battery does anyone know how to change them?