Dell OptiPlex 270 Service Manual

Contents

Back to Contents PagePower SupplyDell™ OptiPlex™ GX270 Service ManualRemoving the Power SupplyReplacing the Power Supply1. Shut down the computer through the Start menu.2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shutdown your computer, turn them off now.3. Disconnect any telephone or telecommunication lines from the computer.4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.5. Remove the computer stand, if it is attached.6. Open the computer cover.Removing the Power SupplySmall Form-Factor Computer1. 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 mustroute these cables properly when you replace them to prevent their being pinched or crimped.2. Press the release button located on the floor of the computer frame.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 thesystem board has turned off. To locate the light, see "System Board."NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of thecomputer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.