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Technical Overview

Dell™ Dimension™ 8400 Service Manual

Inside Your Computer

System Board Components

Power Supply DC Connector Pin Assignments

Inside Your Computer

Follow the procedures in "

Before You Begin

."

System Board Components

CAUTION:

Before you begin any of the procedures in this section, follow the safety instructions located in the

Product Information Guide

.

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Summary of Contents for Dimension 8400 Series

Page 1: ...en Trademarks used in this text Dell the DELL logo and Dimension are trademarks of Dell Inc Intel and Pentium are registered trademarks of Intel Corporation Microsoft and Windows are registered trademarks of Microsoft Corporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Inc disclaims any propri...

Page 2: ...st Ensure that the voltage selection switch is set to match the AC power at your location if applicable Ensure that the processor power cable is securely connected to the system board l If the power light is steady amber a device might be malfunctioning or incorrectly installed Remove and then reinstall the memory modules Remove and then reinstall any cards Remove and then reinstall the graphics c...

Page 3: ...tected l If you have two or more memory modules installed remove the modules reinstall one module and then restart the computer If the computer starts normally reinstall an additional module Continue until you have identified a faulty module or reinstalled all modules without error l If available install properly working memory of the same type into your computer l If the problem persists contact ...

Page 4: ...essage appeared Message Possible Cause Corrective Action 8042 Gate A20 error The keyboard controller failed its test If you receive this message after you make changes in the system setup program enter the system setup program and restore the original value s Address Line Short An error in the address decoding circuitry in the memory has occurred Reseat the memory modules C Drive Error C Drive Fai...

Page 5: ...ends INTR1 Error INTR2 Error An interrupt channel on the system board failed to POST The keyboard or system board may need to be replaced Invalid Boot Diskette The operating system cannot be located on drive A or drive C Enter the system setup program and confirm that drive A or drive C is properly identified Keyboard Error The BIOS has detected a stuck key Ensure that nothing is resting on the ke...

Page 6: ...perating system press and hold the power button for 4 seconds Before Working Inside Your Computer Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety 1 Turn off your computer NOTICE To avoid losing data save and close any open files and exit any open programs before you turn off your computer CAUTION Before you begin a...

Page 7: ...le first unplug the cable from your computer and then unplug it from the network device 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...

Page 8: ... the release button on the left side of the computer with one hand while pulling up on the top of the cover with the other hand c Hold the bottom of the computer with one hand and then pull open the cover with the other hand Back to Contents Page CAUTION Before you begin any of the procedures in this section follow the safety instructions located in the Product Information Guide CAUTION To guard a...

Page 9: ...er down b Press down on the right side of the cover until it closes c Press down on the left side of the cover until it closes d Ensure that both sides of the cover are locked If not repeat all of step 3 4 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page CAUTION Before you begin any of the procedures in this section follow the safety instructions locat...

Page 10: ...he label on the upper right corner of the module to determine the module s capacity The recommended memory configurations are A pair of matched memory modules installed in DIMM connectors 1 and 2 or A pair of matched memory modules installed in DIMM connectors 1 and 2 and another matched pair installed in DIMM connectors 3 and 4 l If you install mixed pairs of DDR2 400 MHz PC2 3200 and DDR2 533 MH...

Page 11: ... the module with the crossbar in the connector NOTE Memory purchased from Dell is covered under your computer warranty NOTICE If you remove your original memory modules from the computer during a memory upgrade keep them separate from any new modules that you may have even if you purchased the new modules from Dell If possible do not pair an original memory module with a new memory module Otherwis...

Page 12: ... PCI Express x1 card slot PCI Cards NOTICE To avoid damage to the memory module press the module straight down into the connector while you apply equal force to each end of the module NOTICE To connect a network cable first plug the cable into the network device and then plug it into the computer CAUTION Before you begin any of the procedures in this section follow the safety instructions located ...

Page 13: ...ning Then continue with step 5 4 If you are replacing a card that is already installed in the computer remove the card If necessary disconnect any cables connected to the card Grasp the card by its top corners and ease it out of its connector 5 Prepare the card for installation See the documentation that came with the card for information on configuring the card making internal connections or othe...

Page 14: ...rnal audio devices to the sound card s connectors Do not connect external audio devices to the microphone speaker headphone or line in connectors on the back panel 12 If you installed an add in network adapter and want to disable the integrated network adapter a Enter system setup select Network Controller and then change the setting to Off b Connect the network cable to the add in network adapter...

Page 15: ...twork cable to the integrated connector on the back panel of the computer PCI Express Cards Your computer supports one PCI Express x16 card and one PCI Express x1 card If a card fan is not present in your computer and you are installing a graphics card that runs at 75 W or higher contact Dell to find out how to purchase a card fan If you are installing or replacing a PCI Express card follow the pr...

Page 16: ...rs and then ease it out of its connector 5 Prepare the card for installation See the documentation that came with the card for information on configuring the card making internal connections or otherwise customizing it for your computer 6 If you are installing the card into the x16 card connector position the card so the securing slot is aligned with the securing tab and gently pull the securing t...

Page 17: ... attached to the card See the documentation that came with the card for information about the card s cable connections 13 Close the computer cover reconnect the computer and devices to electrical outlets and then turn them on 14 If you installed a sound card a Enter system setup select Audio Controller and then change the setting to Off b Connect external audio devices to the sound card s connecto...

Page 18: ...ack panel of the computer 11 If you removed an add in network connector a Enter system setup select Network Controller and then change the setting to On b Connect the network cable to the integrated connector on the back panel of the computer 12 Install any drivers required for the card as described in the card documentation Drives Your computer supports a combination of these devices l Up to two ...

Page 19: ... you connect and disconnect a serial ATA cable hold the cable by the connector at each end Power Cable Connector Hard Drive 1 If you are replacing a hard drive that contains data you want to keep back up your files before you begin to remove the hard drive 2 Follow the procedures in Before You Begin Removing a Hard Drive 1 Disconnect the power and data cable from the drive and from the system boar...

Page 20: ...the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail 4 Install the hard drive into the computer by gently sliding the drive into ...

Page 21: ...verify that it is configured for your computer 2 Follow the procedures in Before You Begin 3 Remove the two plastic rails from the inside of the hard drive bay by gently pulling the rails up and out of the bay 4 Attach the rails to the hard drive using the two screws attached to the rails Ensure that the rail tabs are positioned at the back of the hard drive 5 Remove the first hard drive from the ...

Page 22: ... the system board 9 Close the computer cover 10 Connect your computer and devices to their electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation Front Panel Inserts If you are installing a new floppy or CD DVD drive instead of replacing a drive remove the front panel inserts 1 Open the cover to a ...

Page 23: ...insert in your floppy drive kit Attach this insert over the front of the drive bay If you are adding a floppy drive that was not purchased from Dell reattach the empty insert frame over the front of the drive bay Floppy Drive Follow the procedures in Before You Begin Removing a Floppy Drive 1 Disconnect the power and data cables from the back of the floppy drive 2 Disconnect the other end of the d...

Page 24: ...es on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail 2 Gently slide the drive into place until the tabs securely click into position 3 Attach the power and data cables to the floppy drive 4 Connect the other end of the data cable to the connector labeled FLOPPY on the system board 5 If you are installing a new floppy dr...

Page 25: ...the procedures in Before You Begin 2 Disconnect the power and data cables from the back of the drive 3 Press inward on the two tabs on the sides of the drive and then slide the drive upward and remove it from the drive bay NOTICE To connect a network cable first plug the cable in to the network device and then plug it in to the computer CAUTION Before you begin any of the procedures in this sectio...

Page 26: ...h the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail 4 Gently slide the drive into place until the tabs securely click into position 5 Connect the power and data cables to the drive 6 If you are installing a new CD DVD drive rather than replacing a drive remove the front panel inserts 7 Check all cable connections and fold cables out of t...

Page 27: ...Begin 2 Remove the heat sink a Remove the retention module clips Press the tabs toward the center of the clip and lift up CAUTION Before you begin any of the procedures in this section follow the safety instructions in the Product Information Guide CAUTION Before you begin any of the procedures in this section follow the safety instructions in the Product Information Guide NOTICE CAUTION The heat ...

Page 28: ...ion base 3 Push down and out on the socket release lever 4 Open the processor cover NOTICE Lay the heat sink down on its side Do not touch or remove the thermal grease on the bottom of the heat sink NOTICE If you are installing a processor upgrade kit from Dell discard the original heat sink If you are not installing a processor upgrade kit from Dell reuse the original heat sink and blower when yo...

Page 29: ...s positioned correctly press it with minimal pressure to seat it 5 When the processor is fully seated in the socket close the processor cover Ensure that the tab on the processor cover is positioned underneath the center cover latch on the socket NOTICE Ground yourself by touching an unpainted metal surface on the back of the computer NOTICE You must position the processor correctly in the socket ...

Page 30: ...ct your computer and devices to electrical outlets and turn them on System Board Removing the System Board 1 Follow the procedures in Before You Begin NOTICE If you are not installing a processor upgrade kit from Dell reuse the original heat sink assembly when you replace the processor NOTICE Ensure the heat sink is correctly seated and secure NOTICE To connect a network cable first plug the cable...

Page 31: ...board and transfer them to the replacement system board 2 Configure the settings of the replacement system board 3 Set the jumpers on the replacement system board so they are identical to the ones on the existing board 4 Orient the replacement board by aligning the notches on the bottom of the board with the tabs on the computer 5 Slide the system board assembly toward the back of the computer unt...

Page 32: ...Power Supply 1 Slide the power supply into place 2 Replace the two screws that secure the power supply to the back of the computer frame 3 Reconnect the DC power cables 4 Connect the AC power cable to the connector 5 Run the cables underneath the clips and press the clips to close them over the cables 6 Close the computer cover NOTICE To prevent static damage to components inside your computer dis...

Page 33: ...our computer and devices to electrical outlets and turn them on 8 Enter system setup and restore the settings you recorded in step 1 9 Properly dispose of the old battery See the Product Information Guide for battery disposal information Back to Contents Page CAUTION Before you begin any of the procedures in this section follow the safety instructions located in the Product Information Guide NOTIC...

Page 34: ...aximum memory 4 GB NOTE See Addressing Memory With 4 GB Configurations to verify the amount of memory available to the operating system BIOS address F0000h Computer Information Chipset Intel 925X Express or Intel 925XE Express DMA channels eight Interrupt levels 24 BIOS chip NVRAM 4 Mb NIC Integrated network interface capable of 10 100 1000 communication System clock 800 or 1066 MHz data rate depe...

Page 35: ...2 keyboard and mouse two 6 pin mini DIN connectors USB two front panel and six back panel USB 2 0 compliant connectors Audio five connectors for line in line out microphone surround and center Low Frequency Effects LFE channel one front panel connector for headphones System board connectors Primary IDE drive 40 pin connector on PCI local bus Serial ATA four 7 pin connectors Floppy drive 34 pin con...

Page 36: ...0 60 Hz manual selection and auto sensing power supplies 90 to 135 V at 50 60 Hz 180 to 265 V at 50 60 Hz 100 V at 50 60 Hz for Japanese computers Backup battery 3 V CR2032 lithium coin cell Physical Height 42 5 cm 16 7 inches Width 18 1 cm 7 1 inches Depth 44 7 cm 17 6 inches Weight 12 7 kg 28 lb Environmental Temperature Operating 10 to 35 C 50 to 95 F NOTE At 35 C 95 F the maximum operating alt...

Page 37: ...ogram Certain changes can make your computer work incorrectly Options List This field appears on the left side of the system setup window The field is a scrollable list containing features that define the configuration of your computer including installed hardware power conservation and security features Scroll up and down the list with the up and down arrow keys As an option is highlighted the Op...

Page 38: ...e operates at the level suggested by the drive manufacturer l Performance The hard drive operates at its maximum speed NOTE Switching to performance mode may cause the drive to be noisier but its performance is not affected NOTE Changing the acoustics setting does not alter your hard drive image Security This section displays available system security options Admin Password This option provides re...

Page 39: ...om of the menu enter the number of the device that is to be used for the current boot only For example if you are booting to a USB memory key highlight USB Flash Device and press Enter Changing Boot Sequence for Future Boots 1 Enter system setup 2 Use the arrow keys to highlight the Boot Sequence menu option and press Enter to access the menu 3 Press the up and down arrow keys to move through the ...

Page 40: ...press the power button to ground the system board 8 Open the computer cover 9 Locate the 3 pin password jumper PASS on the system board and attach the jumper to pins 1 and 2 to re enable the password feature 10 Close the computer cover 11 Connect your computer and devices to electrical outlets and turn them on Clearing CMOS Settings 1 Follow the procedures in Before You Begin 2 Reset the current C...

Page 41: ...n pins 1 and 2 and wait approximately 5 seconds d Replace the jumper plug on pins 2 and 3 3 Close the computer cover 4 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer ...

Page 42: ...puter System Board Components Power Supply DC Connector Pin Assignments Inside Your Computer Follow the procedures in Before You Begin System Board Components CAUTION Before you begin any of the procedures in this section follow the safety instructions located in the Product Information Guide ...

Page 43: ...Power Supply DC Connector Pin Assignments DC Power Connector P1 ...

Page 44: ... AWG 10 12 VB DC White 18 AWG 11 12VB DC White 18 AWG 12 3 3 VDC Orange 16 AWG 13 3 3 VDC Orange 16 AWG 14 12 VDC Blue 18 AWG 15 COM Black 18 AWG 16 PS ON Green 18 AWG 17 COM Black 18 AWG 18 COM Black 18 AWG 19 COM Black 18 AWG 20 N C N C 18 AWG 21 5 VDC Red 18 AWG 22 5 VDC Red 18 AWG 23 5 VDC Red 18 AWG 24 COM Black 18 AWG Pin Number Signal Name 18 AWG Wire 1 COM Black 2 COM Black 3 12 VA DC Yell...

Page 45: ...VB DC White Pin Number Signal Name 18 AWG Wire 1 N C N C 2 COM Black 3 COM Black 4 3 3 VDC Orange 5 5 VDC Red 6 12B VDC White Pin Number Signal Name 18 AWG Wire 1 12 VB DC Yellow 2 COM Black 3 COM Black 4 5V DC Red Pin Number Signal Name 18 AWG Wire 1 5 VDC Red 2 COM Black 3 COM Black 4 12 A VDC Yellow Pin Number Signal Name 18 AWG Wire ...

Page 46: ...ack 3 COM Black 4 5V DC Red Pin Number Signal Name 18 AWG Wire 1 12 B VDC White 2 12 B VDC White 3 12 B VDC White 4 COM Black 5 COM Black 6 COM Black NOTE The P10 connector is intended for use with PCI Express graphics cards that have power requirements exceeding 75 watts ...

Page 47: ...n OptiPlex Latitude PowerEdge PowerVault PowerApp and Dell OpenManage are trademarks of Dell Inc Intel and Pentium are registered trademarks of Intel Corporation Microsoft Windows and MS DOS are registered trademarks of Microsoft Corporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Inc disclaim...

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