The procedures in this guide require that you remove the cover and work inside the system. While working inside the system, do not attempt to service the system except as explained in this manual and elsewhere in your system documentation.
Always follow the instructions closely, and ensure that you review all information in "Safety Instructions" in the System InformationGuide.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
The system is enclosed by a bezel and a cover. To open the system, remove the front bezel and cover to access the CD and diskette drives, hard drives, power supply, and other internal system components.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Ensure that you did not leave tools or parts inside the system.
Place the cover over the sides of the chassis, and slide the cover forward until it snaps
into place. See Figure 4-2.
Tighten the thumbscrew at the back of the system to secure the cover.
Reconnect the system to the electrical outlet, and turn on the system.
In Figure 4-3, the bezel and system cover are removed to provide an interior view of the system. The callouts in Figure 4-3 are linked to the appropriate removing and installing procedures.
Figure 4-3. Inside the System
The system board holds the system's control circuitry and other electronic components. Several hardware options such as the processors and memory are installed directly on the system board. Using a riser board, the system can accommodate up to two expansion cards. The upper slot supports PCI 64-bit, 33-MHz expansion cards and the lower slot supports PCI-X 64-bit, 133-MHz expansion cards.
The hard-drive bays provide space for up to two IDE or SCSI drives and a CD/diskette drive combination. The SCSI hard drives must be connected to a controller card. Power is supplied to the backplane board, the system board, and internal peripherals through a single nonredundant power supply.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Position the control panel inside the CD/diskette drive slot.
Position the light pipe assembly over the LEDs and through the two holes on the front
panel and secure the light pipe assembly and the control panel with the three screws
you removed in step 4 of the procedure, "Removing the Control Panel Assembly."
Connect the control panel cable to the control panel. See Figure 4-4.
Your system contains up to two non-hot-pluggable IDE or SCSI hard drives. If your system contains SCSI hard drives, they must be connected to a SCSI controller board. The cables for the SCSI hard drives are routed through openings in the backplane bracket and the PCI fan bracket, to the controller.
The procedures for removing and installing IDE or SCSI hard drives are the same.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Disconnect the power and interface cables from the hard drive.
The interface cables for IDE hard drives are connected to the backplane board, or through the backplane board to an IDE controller board, if one is installed.
The interface cables for SCSI hard drives are connected through the backplane board to a SCSI controller card or to a RAID controller card, if one is installed.
Loosen the thumbscrew that secures the hard-drive carrier to the chassis. See
Figure 4-5.
Figure 4-5. Removing and Installing a Hard Drive
Slide the hard-drive carrier backward and lift the carrier out of the chassis.
Using a #2 Phillips screwdriver, remove the four screws that secure the hard drive to
the carrier and remove the drive from the carrier. See Figure 4-6.
Figure 4-6. Removing the Hard Drive From the Drive Carrier
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Align the hard-drive mounting holes with the holes in the drive carrier.
Using a #2 Phillips screwdriver, install the four screws that secure the hard drive to the
carrier. See Figure 4-6.
NOTE: Install the two screws at the front of the hard-drive carrier first.
Align the hard-drive carrier so that the shoulder washers on the carrier slide into the
mounting notches in the chassis.
Slide the carrier forward until it stops.
Tighten the thumbscrew that secures the hard-drive carrier to the chassis.
Connect the power and interface cables to the new drive.
The interface cables for IDE hard drives are connected to the backplane board, or through the backplane board to an IDE controller board, if one is installed.
The interface cables for SCSI hard drives are connected through the backplane board to a SCSI controller card or to a RAID controller card, if one is installed.
The CD/diskette drives are mounted on a tray that is secured to the chassis using a thumbscrew. The drives are connected using an interposer card, which connects to the backplane board.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Align the drive tray so that the shoulder washers on the tray slide into the mounting
notches in the chassis.
Slide the tray forward until it stops.
Tighten the thumbscrew that secures the drive tray to the chassis.
Connect the power and interface cable to the CD/diskette drive's interposer card.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Remove the two fasteners that secure the interposer card to the drive tray. See
Figure 4-8.
On the side of the card that is between the card and the drive, push the plunger of
each fastener back into the fastener barrel, using the flat surface of a flat-tipped
screwdriver or other small flat object.
On the side of the interposer card closest to the backplane board, grasp the
plunger head and pull the plunger completely out of the drive tray.
Disconnect the interposer card from the CD drive.
While squeezing the tabs on the drive tray securing lever, rotate the lever all the way
open. See Figure 4-8.
Remove the CD and diskette drives from the drive tray.
If you are replacing the diskette drive, disconnect the interface cable from the diskette drive that connects to the interposer card.
Figure 4-8. Removing and Installing the CD and Diskette Drives
Although SCSI drives are installed in essentially the same way as other drives, their configuration requirements are different. To install and configure a SCSI drive, follow the guidelines in the following subsections.
SCSI interface connectors are keyed for correct insertion. Keying ensures that the pin-1 wire in the cable connects to pin 1 in the connectors on both ends. When you disconnect an interface cable, take care to grasp the cable connector, rather than the cable itself, to avoid stress on the cable.
Each drive attached to a SCSI controller must have a unique SCSI ID number from 0 to 15.
The SCSI hard drive from which the system boots is configured as SCSI ID 0.
If you install optional SCSI drives or change your SCSI configuration, see the documentation for each SCSI drive for information on setting the appropriate SCSI ID number.
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that
drives be attached to the cable in order by ID number.
SCSI logic requires that termination be enabled for the two drives at opposite ends of the SCSI chain and disabled for all drives in between. For internal SCSI drives, termination is configured automatically. See the documentation provided with any optional SCSI drive you purchase for information on disabling termination.
The drive or device from which the system boots is determined by the boot order specified in the System Setup program. See "Using the System Setup Program." To boot the system from a hard drive or drive array, the drive(s) must be connected to the appropriate controller:
To boot from a single IDE hard drive, the master drive (drive 0) must be connected to the IDE 0 connector on the backplane board. To identify system board connectors, see Figure 5-3.
To boot from a single SCSI hard drive, the drive must be connected to the SCSI controller card. See the documentation that accompanied the controller card.
To boot from an IDE or SCSI RAID array, the drive must be connected to the RAID controller card. See the documentation that accompanied the controller card.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Lift the fan assemblies out of the chassis carefully, making sure that the connector
disconnects from the system board. See Figure 4-9, Figure 4-10, and Figure 4-11 for
the locations of the fan assemblies.
If you are removing the processor fan assembly, remove the two cooling shrouds before removing the fan assembly. See Figure 4-3 for the location of the cooling shrouds.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Align the replacement fan assembly's connector with the connector on the system
board and the pegs on the chassis. See Figure 4-9, Figure 4-10, and Figure 4-11 for the
locations of the fan assemblies.
Push down on the fan assembly until it is properly seated on the chassis pegs and to
the three-pin connector on the system board.
If you are installing the processor fan assembly, install the two cooling shrouds after installing the processor fan assembly. See Figure 4-3 for the location of the cooling shrouds.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
The system supports up to two PCI expansion cards, which are installed in connectors on a riser board. The upper slot supports 64-bit, 33-MHz cards and the lower slot supports 64-bit, 133-MHz cards. See Figure 5-5. If you are installing a remote access controller card, it must be installed in the upper slot of the riser board. Install most RAID controller cards and SCSI controllers in the lower slot.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Remove the expansion-card retainer adjacent to the PCI slots.
Remove the filler bracket on the slot you will be using.
NOTE: Keep this bracket in the event you need to remove the expansion card. Filler
brackets must be installed over empty expansion card slots to maintain Federal
Communications Commission (FCC) certification of the system. The brackets also keep dust
and dirt out of the system and aid in proper cooling and airflow inside the system.
Insert the expansion card firmly into the expansion-card connector on the riser board
until the card is fully seated, being careful not to remove the riser board from the
system board.
If you are installing a SCSI or RAID controller card, route the interface cable through the openings in the backplane bracket and the PCI fan bracket before connecting the cable to the controller card. After routing the interface cable, ensure that the cable is securely connected to the controller card and the hard drives.
NOTE: Ensure that the expansion-card bracket is also inserted into the securing slot on the
chassis's back panel.
Replace the expansion-card retainer. See Figure 4-13.
Connect any external cable(s) to the expansion card.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Disconnect any external cable(s) that are connected to the expansion card.
Remove the expansion-card retainer adjacent to the PCI slots. See Figure 4-13.
Grasp the expansion card and carefully pull it away from the riser-board connector.
If you are removing a SCSI controller card, disconnect the cables from the card that connects to the SCSI hard drives.
If you are permanently removing the card, replace the metal filler bracket over the
empty card-slot opening.
NOTE: Filler brackets must be installed over empty expansion-card slots to maintain FCC
certification of the system. The brackets also keep dust and dirt out of the system and aid in
proper cooling and airflow inside the system.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Turn off the system and attached peripherals, and disconnect the system from the
electrical outlet.
Remove the expansion cards installed in the riser board. See "Removing an Expansion
Card." PCI slot 1 is on top and PCI slot 2 is on the bottom.
Loosen the two thumbscrews that secure the riser board to the system board. See
Figure 4-14.
From the back of the system chassis, slide the riser board to the right to disconnect the
system board card-edge connector, and lift the riser board up and out of the chassis.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Slide the replacement riser board onto the system board card-edge connector on the
side of the system board.
Secure the riser board with its two thumbscrews. See Figure 4-14.
The three memory module sockets are located on the system board adjacent to the power supply. See Figure 4-3.
You can upgrade the system memory by installing combinations of registered memory modules. If you receive an error message stating that maximum memory has been exceeded, see "Indicators, Messages, and Codes" for more information. You can purchase memory upgrade kits from Dell.
NOTE: The memory modules must be PC-2100 compliant.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Press the ejectors on the memory module socket down and out, as shown in
Figure 4-15, to allow the memory module to be inserted into the socket.
Align the memory module's edge connector with the alignment keys of the memory
module socket, and insert the memory module in the socket.
NOTE: The memory module socket has two alignment keys that allow you to install the
memory module in the socket in only one way.
Press down on the memory module with your thumbs while pulling up on the ejectors
with your index fingers to lock the memory module into the socket.
When the memory module is properly seated in the socket, the ejectors on the memory module socket align with the ejectors on the other sockets that have memory modules installed.
Repeat step 2 through step 5 of this procedure to install the remaining memory
modules.
(Optional) Press <F2> to enter the System Setup program, and check the System
Memory setting on the main Setup screen.
The system should have already changed the value to reflect the newly installed memory.
If the value is incorrect, one or more of the memory modules may not be installed
properly. Repeat step 1 through step 8 of this procedure, checking to ensure that the
memory modules are firmly seated in their sockets.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
It is possible to upgrade your processor to take advantage of future options in speed and functionality. The processor and its associated level 2 (L2) cache memory are contained in a pin grid array (PGA) package that is installed in a ZIF socket on the system board.
The following items are included in the processor upgrade kit:
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
CAUTION: The processor and heat sink can become extremely hot. Be sure the processor has had sufficient time to cool before handling.
Remove both pieces of the cooling shroud.
Pushing down with one hand on the securing clip's rubber-coated tab, use the other
hand to pull the latch on the securing clip to release the securing clip from the heat-
sink posts. See Figure 4-16.
Remove the securing clip.
NOTICE: Never remove the heat sink from a processor unless you intend to remove the
processor. The heat sink is necessary to maintain proper thermal conditions.
Repeat step 3 and step 4 to remove the other securing clip.
Figure 4-16. Removing the Securing Clip
Remove the heat sink.
If the heat sink uses a foil thermal interface material, set the heat sink upside down so as not to contaminate the interface material.
Pull the socket-release lever straight up until the processor is released from the socket.
See Figure 4-17.
Lift the processor out of the socket and leave the release lever up so that the socket is
ready for the new processor.
NOTICE: Be careful not to bend any of the pins when removing the processor. Bending the pins
can permanently damage the processor.
Unpack the new processor.
If any of the pins on the processor appear bent, contact the source from whom you purchased the processor.
Align the pin-1 corner of the processor with the pin-1 corner of the ZIF socket. See
Figure 4-17.
NOTE: Identifying the pin-1 corners is critical to positioning the processor correctly.
Identify the pin-1 corner of the processor by locating the tiny gold triangle on one corner of the processor. Place this corner in the same corner of the ZIF socket identified by a corresponding triangle.
Install the processor in the socket.
Figure 4-17. Installing the Processor in the Socket
NOTICE: Positioning the processor incorrectly can permanently damage the processor and the
system when you turn it on. When placing the processor in the socket, be sure that all of the pins
on the processor enter the corresponding holes. Be careful not to bend the pins.
If the release lever on the processor socket is not positioned all the way up, move it to that position.
With the pin-1 corners of the processor and socket aligned, set the processor lightly in the socket, making sure all pins are matched with the correct holes in the socket. Because the system uses a ZIF processor socket, do not use force, which could bend the pins if the processor is misaligned. When the processor is positioned correctly, it drops down into the socket with minimal pressure.
When the processor is fully seated in the socket, rotate the socket release lever back down until it snaps into place, securing the processor.
Install the heat sink.
If the new heat sink uses a foil thermal interface material, remove the protective covering and align the holes on both sides of the heat sink with the heat-sink posts on the system chassis.
If the new heat sink has thermal grease, align the holes on both sides of the heat sink with the heat-sink posts on the system chassis.
Orient the securing clips as shown in Figure 4-16.
Position each securing clip over the heat-sink posts, then snap them onto the posts.
While holding down the rubber-coated tab with one hand, push the latch on the
securing clip until it locks the clip onto the post. Repeat this step for the other
securing clip.
As the system boots, it detects the presence of the new processor and automatically changes the system configuration information in the System Setup program.
Press <F2> to enter the System Setup program, and check that the processor information
matches the new system configuration.
The system battery maintains your system's configuration, date, and time information in a special section of memory when you turn off the system. The operating life of the battery ranges from 2 to 5 years, depending on how you use the system (for example, if you keep the system turned on most of the time, the battery gets little use, and therefore lasts longer).
You might need to replace the battery if an incorrect time or date displays during the boot routine along with a message about the wrong time, invalid configuration information, or bad CMOS checksum.
To determine if the battery needs replacing:
Re-enter the time and date through the System Setup program. See "Using the System
Setup Program" for instructions about using the System Setup program.
Turn off the system and disconnect it from electrical power for a few hours.
After several hours, reconnect the system to a power source and turn it back on.
Enter the System Setup program.
If the date and time are not correct in the System Setup program, replace the battery.
NOTE: Some software might cause the system time to speed up or slow down. If the
system seems to operate normally except for the time kept in the System Setup
program, the problem may be caused by software rather than by a defective battery.
NOTE: If the system is turned off for long periods of time (for weeks or months), the
SDRAM may lose its system configuration information. This loss is not caused by a
defective battery.
You can operate the system without a battery; however, the system configuration information maintained by the battery in SDRAM is erased each time you shut down the system. Therefore, you must re-enter the system configuration information and reset the options each time the system boots until you replace the battery. The battery is a 3.0-volt (V) battery.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
Enter the System Setup program and, if possible, make a printed copy of the System
Setup screens. See "Using the System Setup Program."
The system board and backplane board provide IDE interface signal routing between the system board and the two IDE hard-drive bays. In addition, the backplane provides power distribution from the power supply to the system board and to internal peripherals.
The system board and backplane board are removed from the chassis as a single assembly, and are then separated for replacement of either board.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
NOTE: It is not necessary to remove the hard drives or the CD/diskette drive from the system
during this procedure.
To remove the system board/backplane board assembly, perform the following steps:
Turn off the system and attached peripherals, and disconnect the system from the
electrical outlet.
Disconnect the power and interface cables on both hard drives from the backplane board
(connectors JP1, JP2, IDE0 and IDE1).
Disconnect the power supply cable from the back of the backplane board (connector J2).
See "Replacing the Power Supply."
If the hard-drive interface cables are routed through the backplane to a PCI controller
card, disconnect these interface cables from the PCI controller card.
Loosen the thumbscrew securing the system board to the chassis floor.
Loosen the two thumbscrews securing the riser board and disconnect it from the system
board card-edge connector. See "Removing the Riser Board."
Slide the backplane securing latch forward to the open position to allow the system
board/backplane board to move to the forward (unlatched) position.
Slide the system board/backplane board assembly forward, toward the front of the system
and lift the assembly up and out of the chassis. See Figure 4-19.
Figure 4-19. Removing the System Board/Backplane Board Assembly
Lay the system board/backplane board assembly down on a smooth, nonconductive work
surface.
Remove the three Phillip screws that secure the system board to the backplane board. See
Figure 4-20.
Figure 4-20. Separating the System/Backplane Board Assembly
Remove the power cable from the power connector on the system board. See Figure 4-20.
Release the plastic cable tie that secures the cable connector to connector U3 and remove
the free end of the power cable from the backplane board (connector U3).
Pull the backplane board away from the system board. See Figure 4-20.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
NOTE: It is not necessary to remove the hard drives or the CD/diskette drive from the system
during this procedure.
To install the system board/backplane board assembly, perform the following steps:
Connect the four-conductor power cable to the back of the backplane (connector U3).
Secure this connector with a plastic cable tie to the backplane.
Connect the system board to the backplane board. See Figure 4-20.
NOTICE: Use a screw only in the center screw hole to secure the system board/backplane board
to the chassis.
Using one of the three Phillips screws removed in step 21 of the board removal procedure,
secure the system board/backplane board to the chassis using the center screw hole (see
Figure 4-21). Discard the other two screws.
Figure 4-21. Joining the System/Backplane Board Assembly
Connect the free end of the four-conductor power cable that you installed on the back of
the backplane (in step 1) to the power connector (CN2) on the system board.
Lower the system board/backplane board into the system chassis with the grounding
posts through the holes on the system board.
Slide the system board/backplane board assembly back towards the system back panel.
Ensure that the tabs on the backplane are installed through their slots on the system chassis, and that the grounding posts are properly locked in their slotted holes on the system board.
Secure the backplane securing latch by sliding it toward the backplane until it locks. See
Figure 4-19.
Secure the system board to the system chassis by tightening the thumbscrew. See
Figure 4-19.
Lower the backplane releasing latches to the locked position. See Figure 4-20.
