Installing The System Board - IBM System x3550 Type 7978 Problem Determination And Service Manual

10. Disconnect the power-supply backplane; then, slide it to the side and set it out
11. Remove the six screws on the system board that secure the system board to
12. Remove the four hex standoff screws from the serial connector and the video
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

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.
7. Remove all heat sinks and microprocessors, and set them aside on a
static-protective surface for reinstallation (see "Installing a microprocessor" on
page 138).
8. Remove the memory modules and set them aside on a static-protective
surface for reinstallation (see "Installing a memory module" on page 110).
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 99.
of the way (see "Removing the power-supply backplane" on page 135).
the chassis.
connector at the rear of the server.
careful not to disturb any surrounding components.
Chapter 4. Removing and replacing server components
145