Elektron Musical Instruments

I tested the PSU and the voltage is at 6V.  There is an electronic 
shop that works  I'm sure it is just a minor problem but am not sure 
if I should trust them with this expensive piece of equipment.  Anyone 
have any advice for me.  On top of this, it worked fine the year I had 
it and it does this the week before I plan on travelling to Des Moines 
to make music with a friend.