Dave Smith Instruments SYNTHESIZERS

hi.. i have some strange problem with turning on the evolver..maybee 
someone else experienced something like this...?

when i plug in the power supply my evolver doesn´t make any sound for 
a few times. sequencer is running but no sound on every patch in 
every bank. and the display gives me strange signs when going intoo 
patch parameters. after a couple of times pluging in and out the 
power everything works fine.. but i mabee should replace my unit 
before it starts to do even more strange things? 
anyone?
_phono;)=