Maintenance and Service Guide

Processor
For a list of available processors, see Illustrated parts catalog on page 5.
1. Prepare the computer for disassembly (see Preparing to disassemble the computer on page 16).
2. Remove the base unit rear and front access panels (see Base unit access covers on page 17).
3. Move the fans aside (see Fans on page 27). You do not have to disconnect the fans from the computer to
remove the processor.
4. Remove the heat sink (see Heat sink on page 36).
5. Rotate the locking lever to its full open position (1).
6. Raise and rotate the microprocessor retainer to its fully open position (2), and then carefully lift the
processor from the socket (3).
CAUTION: Do NOT handle the pins in the processor socket. These pins are very fragile and handling
them could cause irreparable damage. Once pins are damaged it may be necessary to replace the
system board.
The heat sink must be installed within 24 hours of installing the processor to prevent damage to the
processor’s solder connections.
NOTE: After installing a new processor onto the system board, always update the system ROM to ensure
that the latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the
Web at: http://www.hp.com.
38 Chapter 4 Removal and replacement procedures