Dell™ OptiPlex™ GX270 Service Manual Safety Instructions Opening the Computer Cover Chassis Intrusion Switch Control Panel I/O Panel Power Supply System Board Closing the Computer Cover To remove or replace all other GX270 components, see the Dell OptiPlex GX270 Systems User's Guide. NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
Back to Contents Page Chassis Intrusion Switch Dell™ OptiPlex™ GX270 Service Manual Removing the Chassis Intrusion Switch Replacing the Chassis Intrusion Switch Resetting the Chassis Intrusion Detector CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions." NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off.
Small Mini-Tower Computer Replacing the Chassis Intrusion Switch 1. Slide the chassis intrusion switch into its slot and reconnect the cable to the connector on the control panel. 2. Close the computer cover. 3. Attach the computer stand, if it is used. NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer. 4. Connect your computer and devices to electrical outlets, and turn them on. Resetting the Chassis Intrusion Detector 1.
NOTE: The default is Enabled-Silent. NOTE: If a setup password has been assigned by someone else, contact the network administrator for information on resetting the chassis intrusion detector. 3. Press to restart the computer and implement your changes.
Back to Contents Page Control Panel Dell™ OptiPlex™ GX270 Service Manual Removing the Control Panel Replacing the Control Panel CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions." NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off. To locate the light, see "System Board." 1. 2. Shut down the computer through the Start menu.
1 metal control-panel shield 2 screw 2. Remove the metal control-panel shield. 3. Remove the screw that holds the control panel to the computer, and remove the control panel. Small Desktop Computer 1. Remove the front I/O panel (see I/O Panel). 2. Using an 8-inch #2 Phillips screwdriver, remove the screw that secures the control panel to the computer, and lift the panel away from the computer. Small Mini-Tower Computer 1.
1 computer cover tab (remove the CD drive to access this tab) 4 bottom panel 2 top-panel tabs 5 computer cover screw 3 top panel 6 computer cover tabs (2) 2. To prepare the computer cover for removal, release the three computer cover tabs (one tab is located by the CD drive and two tabs are located by the I/O panel). NOTE: To release the tab located by the CD drive, you can pry the computer cover away from the computer and pull out the tab. 3. If necessary, remove the computer cover screw.
2. Replace the computer cover. Ensure that the two metal hooks and tabs are securely in position. To help replace the computer cover, remove the accent door and front mask from the computer cover: a. Remove the front mask by releasing the tabs on the inside of the computer cover. b. Remove the accent door by pressing the middle of the door while you lift away the sides of the door. 1 accent door 2 front mask 3.
Follow the steps in the "Removing the Control Panel" procedure in the reverse order, ensuring that all tabs are secure. Small Mini-Tower Computer Follow the steps in the "Removing the Control Panel" procedure in the reverse order, ensuring that all tabs are secure.
Back to Contents Page Opening the Computer Cover Dell™ OptiPlex™ GX270 Service Manual CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions." 1. 2. Shut down the computer through the Start menu. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now.
1 security cable slot 2 padlock ring 3 release buttons (one on each side) Small Mini-Tower Computer 1. Lay the computer on its side as shown in the illustration. 2. Open the cover: a. Facing the back of the computer, press the release button on the right side of the computer with one hand while pulling up on the top of the cover with the other hand. b. Press the release button on the left side of the computer with one hand while pulling up on the top of the cover with the other hand. c.
Back to Contents Page Closing the Computer Cover Dell™ OptiPlex™ GX270 Service Manual CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions." 1. Ensure that all cables are connected, and fold cables out of the way. Gently pull the power cables toward you so that they do not get caught underneath the drives. 2. Ensure that no tools or extra parts are left inside the computer. 3. Close the cover: a. Pivot the cover down. b.
Back to Contents Page I/O Panel Dell™ OptiPlex™ GX270 Service Manual Removing the I/O Panel Replacing the I/O Panel CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions." NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off. To locate the light, see "System Board." 1. 2. Shut down the computer through the Start menu.
2 chassis-intrusion switch cable 5 front audio cable 3 control panel cable I/O cable 6 Small Desktop Computer 1 chassis-intrusion switch cable 4 control panel cable 2 internal speaker cable 5 front audio cable 3 I/O cable 6 mounting screw Small Mini-Tower Computer 1 control panel cable 4 mounting screw 2 front audio cable 5 internal speaker cable 3 I/O cable 6 chassis-intrusion switch cable Replacing the I/O Panel To replace the I/O panel, follow the removal procedures in the
Back to Contents Page Power Supply Dell™ OptiPlex™ GX270 Service Manual Removing the Power Supply Replacing the Power Supply CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions." NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off. To locate the light, see "System Board." 1. 2. Shut down the computer through the Start menu.
1 release button 2 AC power connector 3. Slide the power supply toward the front of the computer approximately 1 inch. 4. Lift the power supply up and out of the computer. Small Desktop Computer 1. Disconnect the DC power cables from the system board and the drives. Note the routing of the DC power cables underneath the tabs in the computer frame as you remove them from the system board and drives. You must route these cables properly when you replace them to prevent their being pinched or crimped.
4. Slide the power supply toward the front of the computer approximately 1 inch. 5. Lift the power supply up and out of the computer. Replacing the Power Supply 1. Slide the power supply into place. 2. On the small mini-tower computer, replace the two screws that secure the power supply to the back of the computer frame. 3. Reconnect the DC power cables. 4. Connect the AC power cable to the connector. 5.
Back to Contents Page System Board Dell™ OptiPlex™ GX270 Service Manual Small Form-Factor System Board 1 floppy-drive connector (DSKT) 11 2 CD/DVD drive connector (IDE2) 12 3 battery socket (BATTERY) 13 4 5 6 front-panel connector (FRONTPANEL) IDE hard-drive connector (IDE1) serial ATA hard-drive connector (SATA1) CD drive audio cable connector (CD_IN) front-panel audio cable connector (FRONTAUDIO) power connector (12VPOWER) 14 serial port connector (SER2) for optional serial port cards 15
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 sp
1 floppy-drive connector (DSKT) 12 CD drive audio cable connector (CD_IN) 2 CD/DVD drive connector (IDE2) 13 front-panel audio cable connector (FRONTAUDIO) 3 battery socket (BATTERY) 14 power connector (12VPOWER) 4 front-panel connector (FRONTPANEL) 15 serial port connector (SER2) for optional serial port cards 5 IDE hard-drive connector (IDE1) 16 microprocessor and heat sink connector (CPU) 6 serial ATA hard-drive connector (SATA2) 17 microprocessor fan connector (FAN) 7 serial ATA
1. 2. Shut down the computer through the Start menu. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now. NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack. 3. Disconnect any telephone or telecommunication lines from the computer. 4.
10. Remove the system board: a. If your system board is attached to a metal tray, the board and the tray are connected and are removed as one piece. Pull up on the tab and slide the system board assembly toward the front of the computer, and then lift the board up and away. b.
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Back to Contents Page CAUTION: Safety Instructions Dell™ OptiPlex™ GX270 Service Manual General When Working Inside Your Computer Protecting Against Electrostatic Discharge Battery Disposal Use the following safety guidelines to help ensure your own personal safety and to help protect your computer and working environment from potential damage. General l l l Do not attempt to service the computer yourself unless you are a trained service technician. Always follow installation instructions closely.
2. Turn off your computer and any devices connected to the computer. 3. Ground yourself by touching an unpainted metal surface on the chassis before touching anything inside your computer. While you work, periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might harm internal components. 4. Disconnect your computer and devices, including the monitor, from their electrical outlets.
