IBM 8671 - Eserver xSeries 235, Maintenance And Troubleshooting Manual

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Note: 0.01mL is one tick mark on the syringe. If the grease is properly applied,
approximately half (0.22mL) of the grease will remain in the syringe.
6. Install the heat sink onto the microprocessor as described in “Installing an
additional microprocessor” on page 82.
System board
Note:
v Read “Installation guidelines” on page 45.
v
Read the safety notices at “Safety information” on page 169.
v Read “Handling electrostatic discharge-sensitive devices” on page 172.
Attention:
Complete the following steps to remove the system board.
1. Turn off the server and any attached devices.
Notes:
a. When replacing the system board, you must either update the system with
the latest firmware or restore the pre-existing firmware that the customer
provides on a diskette or CD image.
b. When replacing the system board in a server designed for 400 MHz
microprocessors, do not install a system board designed for
microprocessors of greater than 400 MHz (see Chapter 7, “Parts listing for
the xSeries 235,” on page 161).
2. Disconnect external cables and option cables from the back of the server.
3. Lay the server so that the cover is facing up.
4. Remove the cover (see “Removing the left-side cover” on page 55).
5. Disconnect and remove adapters and spacers (see “Working with adapters” on
page 60).
6. Remove the two central fans (see “Replacing a hot-swap fan” on page 94).
7. Remove the plastic baffle.
8. Remove the adapter support bracket (see “Removing and installing the
adapter-support bracket” on page 58).
9. Disconnect all cables from the system board.
Note: Place all disconnected cables carefully to the side so that they do not
come in contact with the center of the system board.
10. Remove all microprocessors and VRMs and set them aside on a
static-protected surface for reinstallation (see “Microprocessor removal” on
page 117).
11. Remove the memory modules and set them aside on a static-protected surface
for reinstallation (see “Installing memory modules” on page 80).
Note: When you set the DIMMs aside, be sure to keep track of the slots they
belong to; DIMMs must be installed in pairs of the same size, speed,
type, and technology.
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xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide