HP C240 - Manual (Page 152)

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Changing Your Workstation’s Hardware Configuration
Installing the EGRAM (Enhanced Graphics RAM) Module (C160/C180)
10 Press in firmly on both ends of the option board at the same time to make sure
that it is firmly seated in the backplane connector.
11 Replace the EISA retainer and its screw, as shown in Figure 47.
12 Replace the EISA slider, as shown in Figure 47.
Figure 47 Installing the EISA Retainer and EISA Slider