Dell C521 Bedienungsanleitung Seite 8
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Removing the Computer Cover
Dell™Dimension™C521ServiceManual
1. Follow the procedures in Before You Begin.
2. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.
3. Locate the cover release latch shown in the illustration. Then, slide the release latch back as you lift the cover.
4. Grip the sides of the computer cover and pivot the cover up using the hinge tabs as leverage points.
5. Remove the cover from the hinge tabs and set it aside on a soft nonabrasive surface.
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CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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 the
computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
NOTICE: Ensure that sufficient space exists to support the removed cover—at least 30 cm (1 ft) of desk top space.
NOTICE: Ensure that you are working on a level, protected surface to avoid scratching either the computer or the surface on which it is resting.
1
computer cover
2
cover release latch
3
security cable slot
- Notes, Notices, and Cautions 1
- About Your Computer 2
- Back View of the Computer 3
- Back Panel I/O Connectors 3
- Before You Begin 5
- Memory 9
- Installing Memory 10
- Cards 11
- Installing an Expansion Card 12
- Removing an Expansion Card 13
- Drives 14
- Drive Interface Connectors 15
- Power Cable Connector 15
- CD/DVD Drive 16
- Floppy Drive 17
- Installing a Floppy Drive 18
- Media Card Reader 19
- Hard Drive 21
- Installing a Hard Drive 22
- Battery 23
- Processor 24
- Installing the Processor 25
- Power Supply 27
- Front I/O Panel 28
- Fan Assembly 29
- System Board 30
- Replacing the System Board 31
- Specifications 33
- System Setup 36
- System Setup Options 37
- Boot Menu 39
- Jumper Locations 40
- Clearing Password Settings 40
- Flashing the BIOS 41
- Technical Overview 42
- Jumper Settings 43
- DC Power Connector P1 44
- DC Power Connector P2 45
- DC Power Connector P3 45
- DC Power Connector P4 45
- DC Power Connector P5 and P6 45
- Troubleshooting 48
- System Lights 49
- Diagnostic Lights 49
- Beep Codes 50
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