Compaq Deskpro 2000 Series Reference Manual page 84

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5 Upgrading the Desktop Computer
3. Slide the expansion board into the expansion slot and press
it firmly into place.
Sliding an Expansion Board into Place in a Desktop
When you install an expansion board, make sure you press firmly
on the board so that the whole connector seats properly in the
expansion board slot.
4. Replace the retainer bracket and the retaining screw. Then
skip to step 8.
Replacing the Retainer Bracket and Retaining Screw