7. Remove all heat sinks and microprocessors, and set them aside on a
static-protective surface for reinstallation (see “Installing a microprocessor” on
page 87).
8. Remove the memory modules and set them aside on a static-protective
surface for reinstallation (see “Installing a memory module” on page 54).
Note: Make a note of the location of each DIMM as you remove it, so that you
can later reinstall it in the same socket.
9. Remove the two air baffles from the system board. See “Removing the air
baffle” on page 43.
10. Disconnect the power-supply backplane; then, slide it to the side and set it out
of the way (see “Removing the power-supply backplane” on page 84).
11. Remove the six screws on the system board that secure the system board to
the chassis.
12. Remove the four hex standoff screws from the serial connector and the video
connector at the rear of the server.
13. Lift the system board slightly so that it disengages from the locator pin.
14. Slide the system board slightly toward the front of the server.
15. Lift up the left side of the system board.
16. Lift the rest of the system board and carefully remove it from the server, being
careful not to disturb any surrounding components.
17. Remove the socket covers from the microprocessor sockets on the new
system board and place them on the microprocessor sockets of the system
board you are removing.
Installing the system board
Note: When reassembling the components in the server, be sure to route all cables
carefully so that they are not exposed to excessive pressure.
To reinstall the system board, complete the following steps.
96 IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide
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