Probably something fizzed and burned. :tongue:
(pardon the levity)
If you can open this box <i>without voiding a warranty</i>, do so, and see what there is to see. The "fizz" sound is probably something arcing, and the burning smell is probably the arcing part taking some damage. It usually means there's a short somewhere in the system.
<A HREF="http://www.linuxfromscratch.org/" target="_new">LFS</A>: "You don't eat or sleep or mow the lawn; you just hack your distro all day long."