Korg Poly800/EX800 Users

Hey,

I bought a Korg EX-800 off of Ebay a few years back.  When I first 
got it, I tried it out and couldn't get it to produce sound.  The 
person I bought it off of wouldn't take responsibility, so I kind of 
just put it off to the side and slowely forgot about it over the 
years.  Finally just recently I re-discovered it and decided to try 
it out.  When I MIDI up the EX-800 to my Juno 106 the only sound I 
get out of the Ex-800 is an annoying hissing sound and a faint tone.  
I went thru all the programs and adjusted all the parameters, but 
with everything I tried all I got was the hiss and the same tone.  
Except for a few programs that made more of a white noise, swooshing 
sound rather than the annoying hiss.  That was the only real sound I 
could get out of it.

I'm wondering if anyone has any sort of advice for me?  Has anyone 
heard of this problem with the Ex-800 before?  Do you think that I 
just need to reload the factory tape inorder to get the sounds back?  

Does anyone have the EX-800 tape that they could make a copy of for 
me?  

Any help would be much appreciated!

Thanks alot!

Joel