Dell Precision 390 User Manual

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1. Turn off your computer.
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2. Disconnect any telephone or telecommunication lines from the computer.
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3. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
Removing the Computer Cover and Front Panel
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Removing the Computer Cover
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1. Follow the procedures in Before You Begin.
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2. If you have installed a security cable, remove it from the security cable slot.
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3. Lay your computer on a flat surface with the cover facing up.
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4. Pull back the cover latch release.
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5. Locate the three hinge tabs on the edge of the computer.
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6. Grip the sides of the computer cover and pivot the cover up, using the hinges as leverage points.
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NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network port or device.
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 removing the cover.
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.
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.
NOTE: If you have a desktop computer, the drives will appear differently.
1
cover latch release
2
computer cover
3
cover hinges

Dell Precision 390 Specifications

General

Memory	Up to 8GB DDR2 SDRAM
Network	Integrated Gigabit Ethernet
Processor	Intel Core 2 Duo
Chipset	Intel 975X Express
Graphics	ATI FireGL
Storage	SATA 3.0Gb/s
Optical Drive	DVD-ROM, DVD+/-RW
Operating System	Microsoft Windows XP Professional, Red Hat Linux
Power Supply	375W
Expansion Slots	1 PCI Express x1 slot, 3 PCI slots
Ports	USB 2.0, serial, parallel