Well for one thing,I know it needs some servicing. As for reseting, you know,the user stuff like custom presets, set tham back to normal to start from scratch again.I am starting to get alot of static from the inputs 1/4 plug ins and the loop on will not function all the time.Sometimes the channels will not playback.I've had it for at least 4 to 5 years tops and I'm sure it need some re tweeking.Its time.I figure that if I reset the system It would be fine but I guss Roland never thought of that, knuckle heads. I had ordered a book from them and thought it was a "tips using the VS840" and all it was was just simple common sense on how to operate the VS840. I should send them an E Bomb.