Dell Precision 650 - Manual (Page 47)

Inside Your Computer
Cable Colors
(2)
It is recommended that you use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras.
10 keyboard connector If you have a standard keyboard, plug it into the purple keyboard connector. If you have a USB keyboard, plug it into a USB
connector.
11 microphone
connector
Use the pink microphone connector (available on computers with integrated sound) to attach a personal computer microphone for
voice or musical input into a sound or telephony program.
On computers with a sound card, use the microphone connector on the card.
12 serial connector
(COM 2)
Connect a serial device, such as a handheld device, to the serial port. The default designations are COM1 for serial connector 1 and
COM2 for serial connector 2.
For more information, see " System Setup Options ."
13 serial connector
(COM 1)
Connect a serial device, such as a handheld device, to the serial port. The default designations are COM1 for serial connector 1 and
COM2 for serial connector 2.
For more information, see " System Setup Options ."
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the System Information Guide.
CAUTION: To avoid electrical shock, always unplug your computer from the electrical outlet before opening the cover.
NOTICE: Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables from the system board.
1 CD/DVD drive 6 microprocessor airflow shroud
2 floppy drive 7 security cable slot
3 hard drive 8 system board
4 power supply 9 chassis intrusion switch
5 padlock ring
Device Cable Color
Hard drive Blue pull tab
Floppy drive Black pull tab
CD/DVD drive Orange pull tab