Hi 2/12 months ago I bought a fender rumble stage 800 amp. I really love the amp and it's features, however 2 weeks ago the lcd screen went blank. I did some googling and found 4 people who had the same thing happen to their rumble amps and today I joined this group and found 1 guy that had the same thing happen to his rumble 800. I contacted the store where I bought my amp and fender is sending me a replacement amp. Like I said I love the amp and I'm glad I'm getting a new one, but I'm hoping the same thing doesn't happen to the replacement amp. So fender is aware of the problem they said it happens but it's not common. What I would like to know is, what is causing the problem? What is being done to fix it ? What can I do to avoid it from happening? Has anyone else had the same problem with their amp ?