Dell Dimension E521 Manuel d'utilisateur

Dell™Dimension™E521ServiceManual Before You Begin About Your Computer Technical Overview Specifications Advanced Troubleshooting System Setup

If you experience a problem with any device, identify whether the driver is the source of your problem and, if necessary, update the driver.  Windows

 10. Click Finish and restart your computer. Resolving Software and Hardware Incompatibilities If a device is not detected during the operating

Back to Contents Page  Before You Begin Dell™Dimension™E521ServiceManual Getting Started Recommended Tools Turning Off Your Computer 

 2. Disconnect any telephone or telecommunication lines from the computer.  3. Disconnect your computer and all attached devices from their elect

Back to Contents Page  Removing and Installing Parts Dell™Dimension™E521ServiceManual Removing the Computer Cover Memory Cards Drive

 4. Locate the three hinge tabs on the bottom edge of the computer.  5. Grip the sides of the computer cover and pivot the cover up, using the

 Addressing Memory With 4-GB Configurations Your computer supports a maximum of 4 GB of memory when you use four 1-GB DIMMs. Current 32-bit operati

 5. Insert the module into the connector until the module snaps into position. If you insert the module correctly, the securing clips snap into t

l One PCI Express x1 card slot (SLOT2 l Two PCI card slots (SLOT3, SLOT4) See System Board Components for card slot location.  PCI Cards Your com

 8. Before you close the card retention door, ensure that: l The tops of all cards and filler brackets are flush with the alignment bar. l The

Back to Contents Page  About Your Computer Dell™Dimension™E521ServiceManual Front View of the Computer Back View of the Computer Back P

14. If you installed an add-in network adapter and want to use only the add-in network adapter, then disable the integrated network adapter: a. Ent

 6. Replace the computer cover (see Installing the Computer Cover).  7. Reconnect the computer and devices to electrical outlets, and then turn t

6. If you are replacing a card that is already installed in the computer, remove the card. Disconnect any cables connected to the card. Gently pull

 12. Replace the computer cover (see Installing the Computer Cover).  13. Reconnect the computer and devices to electrical outlets, and then tu

 8. Replace the computer cover (see Installing the Computer Cover).  9. Reconnect the computer and devices to electrical outlets, and then turn t

Removing the Drive-Panel Insert  1. Pull the drive-panel insert tab away from the drive panel insert to disengage the insert from the drive panel.

 2. Align the drive panel tabs with the side hinges.  3. Rotate the drive panel toward the computer until it snaps into place on the front pane

When you install a drive, you connect a DC power cable and a data cable to the back of the drive.  Drive Interface Connectors The drive cable conne

Removing a Hard Drive  1. Follow the procedures in Before You Begin.  2. Remove the computer cover (see Removing the Computer Cover).  3. Dis

 4. Align the hard drive bracket with the guides in the hard drive bay.  5. Gently slide the drive into place until you feel a click or the dr

Back View of the Computer Back Panel Connectors NOTICE: Ensure that there is a minimum of two inches of space between all vents and any object

 Adding a Second Hard Drive    1. Check the documentation for the drive to verify that it is configured for your computer.  2. Follow the pro

Removing a Floppy Drive  1. Follow the procedures in Before You Begin.  2. Remove the computer cover (see Removing the Computer Cover).  3. R

Installing a Floppy Drive  1. Follow the procedures in Before You Begin.  2. Remove the computer cover (see Removing the Computer Cover).  3.

 11. Connect your computer and devices to their electrical outlets, and then turn them on. See the documentation that came with the drive for instr

 5. Slide the drive latch release toward the bottom of the computer and, without releasing the drive latch release, slide the Media Card Reader out

l Remove the Media Card Reader from its packaging. l Remove the shoulder screws from the inside of the drive-panel insert and attach the screws to

 5. Slide the drive latch release toward the bottom of the computer and, without releasing the drive latch release, slide the CD/DVD drive out thro

 1. Follow the procedures in Before You Begin.  2. Remove the computer cover (see Removing the Computer Cover).  3. If you are installing a

 12. When you restart your computer, enter system setup (see System Setup), and select the appropriate Drive option. See the documentation that ca

  Replacing the Power Supply  1. Follow the procedures in Before You Begin.  2. Remove the computer cover (see Removing the Computer Cover).

Back to Contents Page  network speed to 10 Mbps to ensure reliable operation. 3 network activity light Flashes a yellow light when the computer is tr

13. Secure the hard drive cable, CD/DVD drive data cable, and the front panel ribbon cable to the securing clip on the side of the power supply.  1

 7. Pull the release lever straight up until the processor is released.  8. Remove the processor from the socket. Leave the release lever exte

 5. Set the processor lightly in the socket and ensure that the processor is positioned correctly.  6. While lightly pressing down on the proce

 11. Connect any cables disconnected before removing the heat sink assembly.  12. Replace the computer cover (see Installing the Computer Cover)

Installing the I/O Panel  1. Reconnect the cables to the I/O panel.  2. Slide the I/O panel into place using the guides on the I/O panel bracket t

 6. Rotate the heat sink assembly towards the rear of the computer, and then remove it from the computer. Lay the heat sink assembly down on its to

 3. Connect the processor fan cable to the system board (see System Board Components).  4. Install the heat sink assembly: a. Place the heat

Place the system board assembly that you just removed next to the replacement system board to ensure it is identical.  Installing the System Board

1. Ensure that all cables are connected, and fold cables out of the way.  2. Ensure that no tools or extra parts are left inside the computer. 

Back to Contents Page Dell™Dimension™E521ServiceManual IfyoupurchasedaDell™nSeriescomputer,anyreferencesinthisdocumenttoMicrosoft®

Back to Contents Page  Advanced Troubleshooting Dell™Dimension™E521ServiceManual Power Lights Diagnostic Lights Beep Codes System Me

Back to Contents Page  Specifications Dell™Dimension™E521ServiceManual  Processor Processor type AMDAthlon™64X2dual-core processor AMD At

connector size 124 pins connector data width (maximum) 32 bits PCI Express  connector one x1 connector size 36 pins connector data width (maximum) 1

Back to Contents Page  orange light — A good connection exists between a 100 Mbps network and the computer. off (no light) — The computer is not dete

Back to Contents Page  System Setup Dell™Dimension™E521ServiceManual Overview Entering System Setup System Setup Options Boot Sequen

System Setup Options NOTE: Depending on your computer and installed devices, the items listed in this section may not appear, or may not appear exa

(On default) Video Primary Video (Auto default) Specifies which video controller is primary when two video controllers are present on the computer. Au

Boot Sequence This feature allows you to set the order in which the BIOS will search devices when trying to find an operating system.  Option Setti

1. If you are booting to a USB device, connect the USB device to a USB connector (see Front View of the Computer).  2. Turn on (or restart) your c

3. Locate the 2-pin password jumper (PSWD) on the system board (see System Board Components), and remove the jumper to clear the password.  4. Repl

 4. If the Export Compliance Disclaimer window appears, click Yes, I Accept this Agreement. The File Download window appears.  5. Click Save this

Beep Codes Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called

Back to Contents Page  Technical Overview Dell™Dimension™E521ServiceManual Inside View of Your Computer System Board Components Power S

Power Supply DC Connector Pin Assignments  DC Power Connector P1 1 fan connector (FAN_CPU1) 2 processor socket (CPU) 3 memory module connectors

 DC Power Connector P2  DC Power Connectors P3, P5, P8, and P9  DC Power Connector P7 7 GND Black 8 PS_PWRGOOD Gray 9 P5AUX Purple 10 V_12P0_

 DC Power Connector P10 Back to Contents Page  Pin Number Signal Name 22-AWG Wire 1 +5 VDC Red 2 GND Black 3 GND Black 4 +12 VADC Yellow  Pin Num

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Dell Diagnostics   Starting the Dell Diagnostics  1. Turn on (or restart) your computer.  2. When the DELL logo appears, press <F12> im

 5. After all tests have completed, close the test window to return to the Dell Diagnostics Main Menu.  6. Close the Main Menu window to exit the