Don, I used a Roland G800. I had a gig[UD ]for 10 months[it was one of those indefinate jobs],My vocalist partner was Joe Pellegrino[the TV sportscaster]. Every night, once a night the G800 shut down and rebooted automatically. Poor Joe was at a lost when this happened, I think he started to have his Dangerfield jokes ready to go..This keyboard worked perfectly during the week at home, but at work,nightmares, usually at the height of Joe's performance....Any way, my repair guy[my Father]checked things out. It turned out not to be the G800, but the power strip I used all that time..Once a night it would arc from one side of the electric bar to the other side. It never tripped the breaker, so I never figured it to be the problem. I decided a while back not to worry about a backup[never needed one yet, 40 years],,besides if my board goes down, I'll just go home and check the posts..