I have owned my DA7 for about 4 years with no issues. This last week it became possessed! After about 10 minutes the faders slam in different directions and the board locks up. I can reboot it and after a few times it is ok, but then after a random time it does the same thing. I have performed a hard reboot and still get the same bad results. Anyone ever see this and have an idea how to fix?

thank you