We've had the same problem on one of our switchers over the past day or two. I did a switcher reboot through the menu. That seemed to fix it until I loaded stills from our external hard drive back into the FM. The light came on and stayed on. Earlier today, we did a shutdown from the menu and power cycled both the panel and frame. That seemed to do the trick. Everything is back as it should be.

I get this problem more often than I would expect - for me it typically happens when I cancel a disk operation, or when I'm using the firewire Frame Memory drive. There are 2 lights on the menu screen...one for the drive & one that lights up when things such as Frame Memory Thumbnails are being processed...that second one tends to go out after a while. When it's the main drive light, the only solution that I've found is unfortunately to reboot the mainframe.

Do you have any USB drives or a firewire drive connected to your system? I know that if I use my 4Gb USB stick, that it takes a little while for things to update. Also, do you have any FM's stored on your internal hard-drive??