Removing and replacing FRUsThis information provides an overview for removing and replacing FRUs.FRUs must be replaced or installed only by trained service technicians.The illustrations in this document might differ slightly from the hardware.Removing a microprocessor and heat sinkThis information provides instructions on how to remove a microprocessor andheat sink.About this taskAttention:v Be extremely careful, the microprocessor socket contacts are very fragile.v Do not allow the thermal grease on the microprocessor and heat sink to come incontact with anything. Contact with any surface can compromise the thermalgrease and the microprocessor socket.v Do not touch the microprocessor contacts. Contaminants on the microprocessorcontacts, such as oil from your skin, can cause connection failures between thecontacts and the socket.v Use the microprocessor installation tool that came with the new microprocessorto remove and install the microprocessor.To remove a microprocessor and heat sink, complete the following steps:Note: This procedure for removing a microprocessor and heat sink also applywhen removing a microprocessor and heat sink from the microprocessor andmemory expansion tray.Procedure1. Read the safety information and installation guidelines, see “Safety” on pagevii and “Installation guidelines” on page 35.2. Turn off the server (see “Turning off the server” on page 22) and all attachedperipheral devices. Disconnect all power cords; then, disconnect all externalcables as necessary to replace the device.3. Remove the server cover (see “Removing the server top cover” on page 226).4. Disconnect any cables that impede access to the heat sink and microprocessor.5. If you are replacing a microprocessor on the system board, remove themicroprocessor and memory expansion tray (see “Removing themicroprocessor and memory expansion tray assembly” on page 305).6. Remove the DIMM air baffle, if one is installed (see “Removing the DIMM airbaffle” on page 232).7. Remove the microprocessor air baffle, if one is installed (see “Removing themicroprocessor air baffle” on page 230).8. Remove the heat sinks:a. Use a screwdriver to loosen the captive screw on one side of the heat sinkto break the seal with the microprocessor.b. Loosen all the captive screws on the heat sink, rotating each screw one fullturn until each screw is loose.Chapter 6. Removing and replacing components 299
