older IBM no post beep

depends on what package your PIII uses. There were some early ones made in Slot-1 configuration (vertically standing long rectangular package) and many more later made in Socket 370 (flat square-ish package). On the Slot-1 CPU there are typically little catches on either end of top corners the CPU that when pushed inward, will allow you to pull the CPU catridge up and out of the slot. Although there can be variances on this design. Sometimes there may even be a plastic "cap" of sorts that runs the length of the CPU, and this can be very difficult to remove at times. With those you have to take a small screwdriver and push a locking tooth in on each side, and pull the cap off, and then you can pull the CPU out of the slot. This brings the fan and heatsink along with it. For the Socket-370 CPUs, you first have to remove the fan-heatsink from the top by removing the metal clip that holds the heatsink to the plastic socket. This involves pushing down on one end to and prying it out release it from the catch. Then remove the heatsink from the CPU. Then the little locking arm on the side of the CPU socket should be visible. You simply raise the arm, and then gently lift the cpu from the socket taking care not to bend any pins.