HP Xw8400 HP xw8400 Workstation - Service and Technical Reference Guide - Page 108

Replacing the processor 1. Disconnect power from the system ( Pre-disassembly procedures on page 50). Remove the access panel (Access panel on page 57), the CPU heatsink (Removing the CPU heatsink on page 93), and the processor (Removing the processor on page 96). 2. Raise the processor socket handle fully (the full swing angle of the lever is approximately 105 degrees). CAUTION: Socket pins are delicate and bend easily. Use extreme care when placing the processor in the socket to avoid bending pins. 3. Align the notches in the processor base with the tabs on the socket. Seat the processor into the socket. Ensure that the underside of the processor is level with the top of the processor socket. Close the processor cover plate. Lightly press down on the processor cover plate while closing the socket lever. Figure 4-68 Seating the processor System board Removing the system board 1. Disconnect power from the system ( Pre-disassembly procedures on page 50), and remove the access panel (Access panel on page 57). Place the workstation on its side with the system board facing up. Remove all expansion boards, graphics cards (Removing PCI or PCI Express cards on page 71), and the CPU heatsink (Processor heatsink on page 93). If an airflow duct is installed, remove the system/memory fan assembly (Power supply on page 62). 2. Disconnect all cables from the system board. NOTE: Make note of the cable connections before disconnecting them from the system board. See Power connections to drives on page 84for more information. 3. Slide the system board forward (1) to disengage the metal mounting standoffs from the chassis. CAUTION: Do not attempt to remove the eight system board mounting screws. These screws are permanently secured and are not removable. 98 Chapter 4 Removal and replacement procedures ENWW