User manual DELL DIMENSION C521

[. . . ] DellTM DimensionTM C521 Owner's Manual Service Tag FlexBay for optional floppy drive or Media Card Reader CD or DVD activity light CD or DVD eject button headphone connector microphone connector diagnostic lights hard drive activity light power button USB 2. 0 connectors (2) cover release latch power connector audio connectors USB 2. 0 connectors (4) network adapter card slots for PCI (1), PCI Express x1 (1) PCI Express x16 (1) VGA video connector (integrated) Model DCNE w w w. c o m Notes, Notices, and Cautions 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. CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. Abbreviations and Acronyms For a complete list of abbreviations and acronyms, see the "Glossary" on page 127. If you purchased a DellTM n Series computer, any references in this document to Microsoft® Windows® operating systems are not applicable. ____________________ Information in this document is subject to change without notice. [. . . ] 11 To verify that the memory is installed correctly, check the amount of memory (RAM) listed. Removing and Installing Parts 67 Removing Memory CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis. 2 Press out the securing clip at each end of the memory module connector. If the module is difficult to remove, gently ease the module back and forth to remove it from the connector. 4 Replace the computer cover (see "Replacing the Computer Cover" on page 90). NOTICE: To connect a network cable, first plug the cable into the network port or device, and then plug it into the computer. 5 Connect your computer and devices to electrical outlets, and then turn them on. Cards CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis. Your DellTM computer provides the following slots for PCI and PCI Express cards: · · One low-profile PCI card slot One low-profile PCI Express x1 and x16 card slot 68 Removing and Installing Parts 1 2 3 4 5 6 1 4 PCI Express x1 card PCI Express x1 card slot 2 5 PCI Express x16 card PCI Express x16 card slot 3 6 PCI PCI card slot If you are installing or replacing an expansion card, follow the procedures in the next section. If you are removing and not replacing an expansion card, see "Removing an Expansion Card" on page 73. If you are replacing a card with a different type of card, remove the current driver for the card from the operating system. Installing an Expansion Card 1 Follow the procedures in "Before You Begin" on page 59. 2 Gently push the release tab on the inside of the card retention door to pivot the door open. 3 If you are installing a new card, remove the filler bracket to create a card-slot opening, then continue with step 5. Removing and Installing Parts 69 1 2 1 release tab 2 card retention door 4 If you are replacing a card that is already installed in the computer, remove the card. See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer. CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any cards. Ensure that the card is fully seated in the slot. 70 Removing and Installing Parts 6 5 1 2 4 3 1 4 bracket within slot alignment guide 2 5 bracket caught outside of slot 3 fully seated card 6 alignment bar not fully seated card 7 Before you close the card retention door, ensure that: · · The tops of all cards and filler brackets are flush with the alignment bar. The notch in the top of the card or filler bracket fits around the alignment guide. Removing and Installing Parts 71 5 4 1 2 3 1 4 release tab alignment guide 2 5 card retention door alignment bar 3 filler bracket 8 Close the card retention door by snapping it into place. Cables routed over the cards can prevent the computer cover from closing properly or cause damage to the equipment. See the documentation for the card for information about the card's cable connections. NOTICE: To connect a network cable, first plug the cable into the network port or device, and then plug it into the computer. 10 Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on. [. . . ] UPS -- uninterruptible power supply -- A backup power source used when the electrical power fails or drops to an unacceptable voltage level. A UPS keeps a computer running for a limited amount of time when there is no electrical power. UPS systems typically provide surge suppression and may also provide voltage regulation. Small UPS systems provide battery power for a few minutes to enable you to shut down your computer. [. . . ]