Installing and Replacing Desktop Board Components
41
To restore back panel audio, follow these steps:
1. Observe the precautions in "Before You Begin" on page 23.
2. Turn off all peripheral devices connected to the computer.
Turn off the computer
and disconnect the AC power cord.
3. Remove the cover.
4. Remove the front panel audio cable.
5. Replace the cover.
Connecting to the Serial Port Header
See Figure 19, B on page 39 for the location of the serial port header. Table 6 shows
the pin assignments for the header.
Table 6. Serial Port Header Signal Names
Pin Signal Name Pin Signal Name
1 DCD 2 RXD#
3 TXD# 4 DTR
5 Ground 6 DSR
7 RTS 8 CTS
9 RI 10 No Connection
Connecting to the Chassis Intrusion Header
Figure 19, C on page 39 shows the location of the chassis intrusion header. This
header can be connected to a mechanical switch on the chassis to detect if the chassis
cover is removed.
Table 7 shows the pin assignments for th
e chassis intrusion header.
Table 7. Chassis Intrusion Header
Pin Description
1 Intruder
2 Ground
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