Pearl playback memory dump issue

[Beaker]

I'm in vegas this weekend lighting a corporate event on a Pearl 2004. Last night I saved my show to disk and called it a night. The next day all my playback with intelligent lighting were gone. I still had the first 2 playbacks (containing nothing but conventional dimmers) in the console. Playback 3-15 were simply gone. I reloaded my showdisk, no change. I had to reprogram the entire event. While reprogramming the board had some weird quirks, for example, whenever i tried to program Pan Tilts on a mover, the display woud stick on size and speed from the previous shapes I was programming. Exit, clear, nothing would change it except moving to other attributes, then back to tilt pan. So far I've got everything back in, but i'm not shutting it off over night! Any ideas?

[Beaker]

I currently suspect battery as it is 6 years old. Will measure voltage next week in the shop.

[niclights]

I would agree about battery. If measures ok then check internal connections etc.