Dell Dimension 2400 - Manual (Page 21)

10. Remove the microprocessor from the socket.
Leave the release lever extended in the release position so that the socket is ready for the new microprocessor.
Installing the Microprocessor
1. Unpack the new microprocessor.
2. If the release lever on the socket is not fully extended, move it to that position.
3. Align the pin-1 corners of the microprocessor and socket.
NOTICE: Lay the heat sink down with the thermal grease facing upward.
NOTICE: If you are installing a microprocessor upgrade kit from Dell, discard the original heat sink. If you are not installing a microprocessor upgrade kit
from Dell, reuse the original heat sink when you install your new microprocessor.
NOTICE: Be careful not to bend any of the pins when you remove the microprocessor from the socket. Bending the pins can permanently damage the
microprocessor.
NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer.
NOTICE: Be careful not to bend any of the pins when you unpack the microprocessor. Bending the pins can permanently damage the microprocessor. If
any of the pins on the microprocessor appears to be bent, see "Contacting Dell" in the Owner's Manual for instructions on obtaining technical assistance.
NOTICE: You must position the microprocessor correctly in the socket to avoid permanent damage to the microprocessor and the computer when you
turn on the computer.