[mncolinlee]

This is a hackish form of "Reflow Soldering." http://en.wikipedia.org/wiki/Reflow_soldering

I used to work at Cray, the supercomputer company. Back in the 1970s, 30 yrs before I got there, they used to solder the circuits on each board by baking the entire board in an actual kitchen oven. With smaller and more delicate circuitry on mainboards these days, this is less practical and more dangerous, but that doesn't mean it isn't still possible with some degree of luck. I'd still recommend removing the BIOS battery if you're crazy enough to attempt this.