Compaq Prolinea 4100, Maintenance & Serice Manual

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6. If an option card is removed and not replaced, fill the opening in the
rear panel with a slot cover as shown in Figure 5-39.
7. Reverse the above procedure to install an option card.
NOTE: If installing an Enhanced Business Audio Board in the option slot,
the speaker cable should be connected to the speaker connector on
the backplane board.
Chapter 5.14 LEDs
The LEDs are mounted on the front card bracket (Figure 5-43). The option
cards, system board, and fax/modem card must be removed prior to removing
the LEDs.
To remove the LEDs, complete the following steps:
1. Complete the steps in Section 5.3 to prepare the computer for
disassembly.
2. Complete the steps in Unit Cover Removal and Replacement in Section 5.4
to gain access to the option cards, system board, and LEDs.
3. Complete the steps in Section 5.11 and 5-13 to remove full-size
expansion and option cards.