I found my problem and now its working.
No, I did not ask how it sat unused for that long. He says he has another one that he has been using.
I like the big screen and its fine for my audio work.
Now I would like to get some of my other scopes working. A 5110 with no HV and a 453 that blows a fuse after working a short while.
I'm giving up on 900 series. I have 4 of them that all work but not correctly. I used to like them but I think they were not built to the high standards of the other models.