IBM x3250 M2 Problem Determination And Service Manual page 110

10. Slide the server into the rack.
11. Connect the cables and power cords.
12. Turn on all attached devices and the server.
Thermal grease
The thermal grease must be replaced whenever the heat exchanger has been
removed from the top of the microprocessor and is going to be reused or when
debris is found in the grease.
To replace damaged or contaminated thermal grease on the microprocessor and
heat exchanger, complete the following steps:
1. Place the heat-exchanger assembly on a clean work surface.
2. Remove the cleaning pad from its package and unfold it completely.
3. Use the cleaning pad to wipe the thermal grease from the bottom of the heat
4. Use a clean area of the cleaning pad to wipe the thermal grease from the
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IBM System x3250 M2 Types 4190, 4191 and 4194: Problem Determination and Service Guide
Heat-exchanger assembly
Release latch
Alignment pins
Alignment hole
5. With the heat-exchanger assembly at an angle as shown in the illustration,
carefully align the heat-exchanger assembly with the microprocessor and the
heat exchanger retention module (socket) on the system board. Make sure that
the alignment pins (the two heat-exchanger nibs that are closer to the
microprocessor) protrude through the alignment hole (the opening in the side
of the heat-exchanger bracket) and that the flange of the heat sink rests under
the lip of the heat-exchanger socket.
6. Gently press the assembly into place.
7. Close the heat-exchanger-assembly release latch, catching it under the hook
on the socket.
8. Replace the air baffle (see "Installing the air baffle" on page 68).
9. Install the cover (see "Installing the cover" on page 51).
exchanger.
Note: Make sure that all of the thermal grease is removed.
microprocessor; then, dispose of the cleaning pad after all of the thermal grease
is removed.