I have a 7904 mainframe chassis minus the plug-in modules free for the
taking - or you pay shipping. Parts or whole. Nice front panel, no
buttons broken off. Worked up until a year or so ago - now when you
turn it on it initially powers up fine but then after a few minutes the
display is gone. Maybe a PS issue, but I have since replaced it with a
smaller model and probably will never get around to fixing it. Let me
know if you need parts or the whole - it is in Erie, PA if you were
interested in picking it up. I'd hate to scrap it as it is still a
useful scope if someone had the time to dedicate to it, but the reality
is I have no time currently.

Thanks,
Greg