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About Your Computer

Dell™ OptiPlex™ GX270 Systems User's Guide

  Front View

  Back View

  Inside Your Computer

  System Board Components

  Attaching and Removing the Computer Stand

Front View

1	USB 2.0 connectors (2)	Use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras, or for bootable USB devices (see System Setup for more information on booting to a USB device). It is recommended that you use the back USB connectors for devices that typically remain connected, such as printers and keyboards.
2	CD/DVD drive-activity light	The drive activity light is on when the computer reads data from the CD or DVD drive.
3	CD/DVD drive eject button	Press to eject a CD/DVD from the drive.
4	floppy-drive eject button	Press to eject a floppy disk from the floppy drive.
5	power button	Press to turn on the computer. NOTICE: To avoid losing data, do not turn off the computer by pressing the power button for 6 seconds or longer. Instead, perform an operating system shutdown. NOTE: If your operating system has ACPI enabled, when you press the power button the computer will perform an operating system shutdown.
6	power light	The power light illuminates and blinks or remains solid to indicate different states: No light — The computer is turned off (S4, S5, or mechanical OFF) Steady green — The computer is in a normal operating state Blinking green — The computer is in a power-saving state (S1 or S3) Blinking or solid amber — See "Power Problems" 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 Management." See "Diagnostic Lights" for a description of light codes that can help you troubleshoot problems with your computer.
7	hard-drive activity 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.
8	headphone connector	Use the headphone connector to attach headphones and most kinds of speakers.

Back View

1	back panel connectors	Plug serial, USB, and other devices into the appropriate connector.
2	card slots	Access connectors for any installed PCI and AGP cards.
3	voltage selection switch (may not be available on all computers)	Your computer is equipped with either an auto-sensing voltage selector or a manual voltage selection switch. Computers with an auto-sensing voltage selector do not have a voltage selection switch on the back panel and can automatically detect the correct operating voltage. To help avoid damaging a computer with a manual voltage selection switch, set the switch for the voltage that most closely matches the AC power available in your location. NOTICE: The voltage selection switch must be set to the 115-V position even though the AC power available in Japan is 100 V. Also, ensure that your monitor and attached devices are electrically rated to operate with the AC power available in your location.
4	power connector	Insert the power cable.

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	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.
3	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) network and the computer. Off — The computer is not detecting a physical connection to the network.
4	network adapter connector	To attach your computer to a network or broadband modem, connect one end of a network cable to either a network jack or your network device. Connect the other end of the network cable to the network adapter connector on the back panel of your computer. A click indicates that the network cable has been securely attached. On computers with a network connector card, use the connector on the card. It is recommended that you use Category 5 wiring and connectors for your network. If you must use Category 3 wiring, force the network speed to 10 Mbps to ensure reliable operation.
5	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.
6	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.
7	line-out connector	Use the green line-out connector (available on computers with integrated sound) to attach headphones and most speakers with integrated amplifiers. On computers with a sound card, use the connector on the card.
8	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, the microphone connector is on the card.
9	USB 2.0 connectors (6)	Use the back USB connectors for devices that typically remain connected, such as printers and keyboards, and for bootable USB devices.
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	diagnostic lights	Use the lights to help you troubleshoot a computer problem based on the diagnostic code. For more information, see "Diagnostic Lights."
12	video connector	Plug the cable from your VGA-compatible monitor into the blue connector. NOTE: If your computer shipped with a video card installed, this connector will have a cap on it. Plug the monitor cable into the connector on the card. NOTE: If you are using a video card that supports dual monitors, use the y-cable that came with your computer.
13	serial connector	Connect a serial device, such as a handheld device, to the serial port. In system setup, the default designation is COM1. For more information, see "System Setup Options."

Inside Your Computer

CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions."

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 disconnect cables from the system board.

1	hard drive	6	system board
2	floppy drive	7	power supply
3	CD/DVD drive	8	padlock ring
4	internal speaker	9	heat sink and blower assembly
5	chassis intrusion switch

Cable Colors

Device	Color
Hard drive	Blue pull tab
Floppy drive	Black pull tab
CD/DVD drive	Orange pull tab
Serial ATA drive	Blue cable

System Board Components

1	floppy-drive connector (DSKT)	11	CD drive audio cable connector (CD_IN)
2	CD/DVD drive connector (IDE2)	12	front-panel audio cable connector (FRONTAUDIO)
3	battery socket (BATTERY)	13	power connector (12VPOWER)
4	front-panel connector (FRONTPANEL)	14	serial port connector (SER2) for optional serial port cards
5	IDE hard-drive connector (IDE1)	15	microprocessor and heat sink connector (CPU)
6	serial ATA hard-drive connector (SATA1)	16	microprocessor fan connector (FAN)
7	internal speaker (SPEAKER)	17	memory module connectors (DIMM_1 and DIMM_2)
8	standby power light (AUX_PWR)	18	power connector (POWER)
9	AGP card connector (AGP)	19	RTC reset jumper (RTCRST)
10	PCI card connector	20	password jumper (PSWD)

Attaching and Removing the Computer Stand

The computer can be used in either a vertical or horizontal position.

To use the computer in a vertical position, you must attach the computer stand:

1. Place the computer on its right side so that the drive bays are at the bottom.
   
   
2. Fit the stand onto what was the left side of the computer.
   
   
   1. Position the stand as shown in the following illustration by aligning the large round hole in the stand with the securing button on the side of the cover and aligning the captive screw in the stand with the screw hole in the cover.
      
      
   2. When the stand is in place, tighten the thumbscrew.
      
      
3. Rotate the computer so that the stand is at the bottom and the drives are at the top.
   
   

To remove the computer stand:

1. Turn the computer over so that the stand is at the top.
   
   
2. Loosen the thumbscrew and lift the stand away.
   
   
3. Place the computer in a horizontal position.
   
   

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