Everybody knows this problem. You have an old main board or any other kind of circuit board with nice chips on it. Mostly they are soldered, and you have no idea how to get these chips off without destroying them. But it's very simple. The only  instrument
you will need is a hot-air blower. You can buy the cheapest one you will get in a DIY-Store. The temperature of this blower is high enough to desolder a chip or a socket and it will not stress the material of a chip.

For my experiment here I took an old Intel Socket 7 main board. I'll show you here how to desolder one of the PCI chipsets and the socket 7.Of course, you can also take a special SMD soldering station, but these are very
expensive parts only needed by an electronic specialist.

Let's Start:

Desoldering Intel PCI Chipset
Intel SB82371SB SU093	The distance between blower and chip should be 5-8 cm. Blow constantly around the chip. Be careful around the capacitors. They will explode if they are too hot!!!	After 2 minutes you can lift off the chip carefully with a small screwdriver.
Ready!! A perfect chip for your collection ;-)	The only thing you will destroy with the blower are other plastic parts.

Desoldering Socket 7
Blow on the bottom of the main board behind the socket. The distance now should be 2-3 cm	After 1 minute you will see the board changing. The solder tin should get hot through the main board.	With a small screw driver you can push out the socket.
Ready!! Now you can construct for example a display board about the history of sockets? ;-)