Replacing the Processor Chip
Follow these steps to replace the processor chip:

1.Use the illustration on page 3-5 to locate the microprocessor on the system board. The microprocessor chip may be inserted in a ZIF (Zero Insertion Force) socket.

caution

Make sure you ground yourself by touching the metal surface on the inside of the computer’s back panel before you touch the processor chip. Then remain as stationary as possible while you install it. Do not touch the pins on the processor chip. Handle the microprocessor only by the edges of its case.

2.If there is an option card in the way, remove it. See page 3-18 for instructions.

3.Open the ZIF socket by lifting up the ZIF handle. The handle rests under a plastic tab. Press the handle down and away from the tab; then rotate the handle upward. This releases the chip from the socket. The illustration on the next page shows this handle in the released position.

4.Gently pull the processor chip straight up and set it aside.N o teThe 486SX/25 microprocessor may be soldered onto anadapter board that is seated in the socket. Remove theadapter board as described above.

5.Remove the replacement chip from its package and inspect the pins. If they are bent, do not install the processor chip. Contact your vendor for a new microprocessor.

Installing and Removing Options

3-25