HP TC2120 - Manual (Page 97)

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Chapter 7 Replacing Parts
4. Align the notches on the DIMM with the keys on the slot.
5. Holding the DIMM at 90 degrees to the system board, press the DIMM fully into the slot until the retaining
latches close.
If the latches do not close, the DIMM is not inserted correctly.
6. Repeat Steps 1-5, to install all of the remaining DIMMs for your memory configuration.
7. Replace the left side cover.
8. Replace the external cables and power cord.
9. Power on the server, as described in Chapter 1‚ Controls and Indicators .
If the DIMMs are not seated properly you may get a blank screen.
Processor
Use the procedures in this section to remove and replace the heat sink-cooling fan and the processor.
Figure 7-9. DIMM to Slot Alignment
NOTE Most DIMMs are dimensionally identical, so, if you have two
or more DIMMs installed, you may verify all DIMMs are
seated by sliding a straight edge (a pen, for example) across
the top edges and verify it remains in continuous contact with
all of the DIMMs.
CAUTION Wear a wrist strap and use a static-dissipating work surface
connected to the chassis when handling components. Ensure
the metal of the wrist strap contacts your skin.
Notches
Retaining Latches
Keys
DIMM Slot