Just one question, Evil Rabbit. I'm getting the impression that you work for Borders?
Just wanted a context to put your comments on the LED thing into, you see.
Thanks for that info, BTW, it's good to have an actual answer as to what the deal was.
I can see it now: LED (probably red or amber) slags, releasing smoke, as they will do. Observer sees smoke + light (probably flickering) -- gasp -- must equal fire! LOL
Putting this with other bits of info I've seen around, I can only guess that somebody maybe forgot to make sure the security system or display power supply was rated properly for the electronics it fed (or should that be fried?).