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About Your Computer—Dell Precision 650

Dell Precision™ Workstations 450 and 650 User's Guide

  Front View

  Back View

  Inside Your Computer

  System Board Components

Front View

1	drive door	Open the drive door to access the floppy and CD/DVD drives.
2	hard-drive light	The hard-drive light is on when the computer reads data from or writes data to the hard drive. The light might also be on when a device such as your CD player is operating.
3	power button	Press this button to turn on the computer. NOTICE: To avoid losing data, do not use the power button to turn off the computer. Instead, perform a Microsoft® Windows® shutdown.
4	power light	The power light illuminates and blinks or remains solid to indicate the following different states: No light — The computer is in the off state. Steady green — The computer is in a normal operating state. Blinking green — The computer is in a power-saving state. To exit from a power-saving state, press the power button or use the keyboard or the mouse if it is configured as a wake device in the Windows Device Manager. For more information about sleep states and exiting from a power-saving state, see "Power Button." See "Diagnostic Lights" for a description of light codes that can help you troubleshoot problems with your computer.
5	front-panel door	Open the door to use the front-panel connectors.

Front View of the Computer (Doors Open)

1	floppy drive	Access the floppy drive.
2	headphone connector	Attach headphones.
3	microphone connector	Attach microphone.
4	USB 2.0 connectors (2)	Use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras. It is recommended that you use the back USB connectors for devices that typically remain connected, such as printers and keyboards.
5	IEEE 1394 connector	Attach high-speed serial multimedia devices, such as a digital video camera.
6	diagnostic lights (4)	Use the lights to help you troubleshoot a computer problem based on the diagnostic code. For more information, see "Diagnostic Lights."
7	externally accessible drives	Access additional drives, such as a CD or DVD drive. Drive arrangement varies on computer configuration.

Opening the Drive Door

Back View

1	cover release latch	Push the latch to the left to open the computer cover.
2	security cable slot	Use a security cable with the slot to help secure your computer.
3	padlock ring	Insert a padlock to lock the computer cover.
4	power connector	Insert the power cable.
5	card slots (6)	Access connectors for any installed PCI and AGP cards.
6	back panel connectors	Plug serial, USB, and other devices into the appropriate connector.

Back Panel Connectors

1	parallel connector	Connect a parallel device, such as a printer, to the parallel connector. If you have a USB printer, plug it into a USB connector. NOTE: The integrated parallel connector is automatically disabled if the computer detects an installed card containing a parallel connector configured to the same address. For more information, see "System Setup Options."
2	line-out connector	Use the green line-out connector (available on computers with integrated sound) to attach headphones and speakers). On computers with a sound card, use the connector on the card.
3	line-in connector	Use the blue line-in connector (available on computers with integrated sound) to attach a record/playback device such as a cassette player, CD player, or VCR. On computers with a sound card, use the connector on the card.
4	mouse connector	Plug a standard mouse into the green mouse connector. Turn off the computer and any attached devices before you connect a mouse to the computer. If you have a USB mouse, plug it into a USB connector. If your computer is running the Microsoft® Windows® 2000 or Windows XP operating system, the necessary mouse drivers have been installed on your hard drive.
5	link integrity light	Green — A good connection exists between a 10-Mbps network and the computer. Orange — A good connection exists between a 100-Mbps network and the computer. Yellow — A good connection exists between a 1-Gbps (or 1000-Mbps) connection. Off — The computer is not detecting a physical connection to the network.
6	network connector	Attach the UTP cable to an RJ45 jack wall plate or to an RJ45 port on a UTP concentrator or hub and press the other end of the UTP cable into the network connector until the cable snaps securely into place. The use of Category 5 wiring and connectors is recommended for our customers' networks. If Category 3 wiring must be used, force the network speed to 10 Mbps to ensure reliable operation. On computers with a network connector card, use the connector on the card.
7	network activity light	Flashes a yellow light when the computer is transmitting or receiving network data. A high volume of network traffic may make this light appear to be in a steady "on" state.
8	USB 2.0 connectors (2)	Use the back USB connectors for devices that typically remain connected, such as printers and keyboards. It is recommended that you use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras.
9	IEEE 1394 connector	Attach high-speed serial multimedia devices.
10	USB 2.0 connectors (2)	Use the back USB connectors for devices that typically remain connected, such as printers and keyboards. It is recommended that you use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras.
11	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.
12	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.
13	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."
14	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."

Inside Your Computer

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	floppy drive	5	padlock ring
2	CD/DVD drive	6	microprocessor airflow shroud
3	hard drive	7	system board
4	power supply	8	chassis intrusion switch

Cable Colors

Device	Cable Color
Hard drive	Blue pull tab
Floppy drive	Black pull tab
CD/DVD drive	Orange pull tab
I/O panel	Yellow pull tab

System Board Components

1	CD/DVD drive connector (IDE2)	15	standby power light (AUX_PWR_LED)
2	I/O panel connector (I/O PANEL)	16	PCI card connectors (PCI1, PCI2 [32-bit connectors], PCI3 , PCI4, and PCI5 [64-bit PCI-X connectors])
3	floppy-drive connector (DISKETTE)	17	telephony connector (MODEM)
4	memory module connectors (DIMM_1, DIMM_2, DIMM_3, DIMM_4)	18	AGP card connector (AGP)
5	suspend-to-RAM light (STR_LED)	19	VRM connector (VRM)(for a second microprocessor only)
6	power connector (POWER 2)	20	microprocessor and heat-sink connector (CPU_1)
7	power connector (POWER 1)	21	front-panel audio connector (FP2AUDIO)
8	front-panel USB/IEEE 1394 connector (USB)	22	microprocessor and heat-sink connector (CPU_0)
9	hard-drive connector (IDE1)	23	microprocessor fan connector (FAN_P1)
10	real-time clock reset jumper (RTCRST)	24	microprocessor fan connector (FAN_P0)
11	card fan connector (FAN)	25	battery socket (BATTERY)
12	SCSI drive connector (SCSI)	26	internal speaker (SPKR)
13	password jumper (PSWD)	27	CD drive audio cable connector (CD_IN)
14	auxiliary LED add-in storage adapter connector (AUX_LED)

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