Dell PowerEdge 840 Systems Hardware Owner's Manual
Front I/O Panel (Service-Only Parts Procedure)
System Board (Service-Only Parts Procedure)
This section describes how to install the following system components:
You may need the following items to perform the procedures in this section:
In Figure 3-1, the system cover is opened and the front bezel removed to provide an interior view of the system.
1 |
front fan |
2 |
drive cage |
3 |
expansion cards (optional) |
4 |
cooling shroud |
5 |
power supply |
6 |
5.25-inch drive bays (2) |
7 |
chassis-intrusion switch |
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The system board can accommodate a single processor, five expansion cards, and four memory modules. The hard-drive cage provides space for up to four SAS or SATA hard drives. Two 5.25-inch external drive bays in the front of the system can accommodate optical or tape drives; a single 3.25 drive can accommodate an optional diskette drive. A controller expansion card is required to use SAS hard drives. Power is supplied to the system board and internal peripherals through a single, nonredundant power supply.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge. |
You must remove the bezel to remove the system cover.
Figure 3-2. Removing the Bezel
1 |
bezel latch |
2 |
bezel |
3 |
keylock |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge. |
Figure 3-3. Removing the Cover
1 |
system cover |
2 |
thumbscrew |
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To help keep dust and dirt out of the system, a plastic insert covers each empty external drive bay. Additionally, each empty external drive bay is covered by a metal insert in the chassis to maintain Federal Communications Commission (FCC) certification of the system.
Before you install a 5.25-inch drive in an empty external drive bay, you must first remove both front-panel drive inserts. If you remove a 5.25-inch drive permanently, you must install both inserts.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-4. Removing the Front-Panel Drive Inserts
1 |
chassis drive insert |
2 |
bezel drive insert |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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NOTICE: You must install both inserts in an empty 5.25-inch drive bay to maintain Federal Communications Commission (FCC) certification of the system. The inserts also help keep dust and dirt out of the system. |
To install the bezel, align the hooks at the bottom of the bezel, swing the top of the bezel toward the system, and press the bezel onto the system until it snaps into place. Using the system key, lock the bezel.
Most 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.
Your system can accommodate many different drive configurations, each with specific cable requirements. Table 3-1 shows the cable requirements for common drive configurations.
Table 3-1. Drive Cable Configuration
Drives |
Required Cable |
Cable Connections |
---|---|---|
IDE optical drives, internal IDE and external SCSI tape drives (with optional SCSI HBA card) (See Figure 3-7.) | 80-pin IDE 2-drop cable or external SCSI cable | IDE drive and primary IDE connector on system board or external SCSI tape device (with option SCSI HBA card) |
Up to four cabled SATA hard drives (non-hot-plug) (See Figure 3-9.) | 7-pin SATA hard-drive cable (one cable per drive) | SATA hard drives and SATA port connectors on the system board, or via SAS controller card |
Up to four cabled (non-hot-plug) SAS hard-drives (See Figure 3-13.) | 32-pin 1- to 4-drop SAS cable | SAS hard drives connected to SAS controller card |
Up to four SAS or SATA hard drives connected to the SAS backplane (hot plug) (See Figure 3-12.) | 32-pin SAS backplane cable | SAS backplane connected to the SAS controller card |
Each drive must connect to a DC power cable from the system power supply. These power cables are used for the 3.5-inch diskette drive, 5.25-inch devices, and hard drives.
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NOTICE: To avoid electrical damage to internal system components, install a cover connector on any unused connectors on hard-drive power cables. |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
For instructions, see the documentation that accompanied the drive.
Figure 3-5. Removing or Installing a Diskette Drive
1 |
diskette (3.5-inch) drive |
2 |
externally accessible drive bay |
3 |
screws (2) |
4 |
interface cable |
5 |
power cable |
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An optical drive is standard in the first external drive bay. An additional IDE or SCSI tape drive can be installed in the second external drive bay. These drives connect either to the system board or to an optional controller card.
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NOTE: Installing an additional optical drive in the second external drive bay is not supported. |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
For instructions, see the documentation that accompanied the drive.
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NOTE: If you are installing a SCSI tape drive, you must install an Ultra 3 SCSI controller card. The optional SAS controller card does not support a SCSI tape drive. |
Figure 3-6. Installing or Removing an Optical or Tape Drive
1 |
5.25-inch drive |
2 |
drive bay |
3 |
screws (2) |
4 |
power cable |
5 |
interface cable |
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NOTE: See the documentation that is included with the controller card for more information. |
If you are installing an IDE device (such as an optical drive), connect the interface cable to the IDE device and the IDE connector on the system board. See Figure 3-7.
If you are installing a SCSI device in the second drive bay (such as a tape backup device), connect the interface cable to the device and to channel A on the SCSI controller card. See Figure 3-7.
See System Board Connectors to locate the system board connectors.
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NOTE: A SCSI device attached to an optional SCSI controller card and an IDE device attached to the system board can be installed together as shown in Figure 3-7. |
Figure 3-7. Connecting a Tape Drive to a SCSI Controller Card
1 |
IDE device |
2 |
optional SCSI device |
3 |
hard drives (up to 4) |
4 |
SCSI controller card |
5 |
SCSI cable |
6 |
IDE interface cable |
If you installed an IDE device, run the IDE devices tests in the system diagnostics to determine whether the device operates properly. See Running the System Diagnostics.
If you installed a SCSI device, run the SCSI controllers test in the system diagnostics. See Running the System Diagnostics.
If you installed a tape drive, see the tape drive software documentation to perform a backup and verification test.
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NOTE: The system's drive configuration must consist of only SATA hard drives or only SAS hard drives. Combining SATA and SAS drives is not supported. |
Your system can contain up to four 1-inch-height SATA or SAS hard drives in either a removable fixed hard-drive bay (see Figure 3-8) or a lever-release bay (see Figure 3-11). These drives connect either to the system board, an optional controller card, or an optional SAS backplane.
SAS or SATA drives can be hot-pluggable only if they are attached to an optional SAS backplane. See Hot-Plug SATA Hard Drives Using the SAS Backplane, Hot-Plug SATA Hard Drives Using the SAS Backplane, and Removing and Installing the Optional SAS Backplane Board.
Use the following guidelines when installing hard drives:
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:
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge. |
If you are using the optional SAS backplane, your hard drives may be installed in a lever-release drive bay. See Removing a Hard Drive from a Lever-Release Drive Carrier for more information.
Figure 3-8. Installing or Removing a Hard Drive
1 |
hard-drive bay |
2 |
screws (4 per drive) |
3 |
hard drive |
4 |
drive cable |
5 |
power cable connector |
6 |
hard drive bay |
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NOTE: Hot-plug capability is supported only when the SAS backplane is installed. For more information, see Hot-Plug SATA Hard Drives Using the SAS Backplane. |
For instructions, see the documentation that accompanied the drive.
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NOTICE: To prevent damage to internal system components, ensure that a connector cap is installed on each available power connector that is not connected to a hard drive. |
Figure 3-9. Connecting SATA Hard Drives to the Integrated Drive Controller
1 |
SATA hard drive (up to four) |
2 |
SATA interface cable |
3 |
SATA_1 connector |
4 |
SATA_0 connector |
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Figure 3-10. Connecting SATA Drives to a SAS Controller Card (SAS backplane not installed)
1 |
SATA hard drive (up to four) |
2 |
SATA interface cable) |
3 |
SAS controller card |
If the drive is connected to a SATA RAID controller card, see the RAID controller card documentation for information on testing the controller.
If the drive is connected to a SAS controller card, run the SAS controller tests and the hard-drive tests in the system diagnostics. See Running the System Diagnostics
If the hard drive fails the hard-drive tests or does not operate properly, see Getting Help.
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NOTICE: To prevent data loss, you must shut down the system before removing a drive carrier, unless a SAS controller is connected to the optional SAS backplane. See Hot-Plug SATA Hard Drives Using the SAS Backplane for information on hot-plug drive requirements and operation. |
The drive bays in a system with an optional SAS backplane board provides space for up to four optional lever-release hard drives. The hard drives plug into the SAS backplane board, which is connected to the controller card (see Figure 3-12). For instructions on installing the optional SAS backplane board, see Removing and Installing the Optional SAS Backplane Board.
Figure 3-11. Removing or Installing a SCSI Hard-Drive Carrier
1 |
hard-drive carrier handle |
2 |
lever-release drive carrier |
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NOTICE: Do not insert a hard-drive carrier and attempt to lock its handle next to a partially installed carrier. Doing so can damage the partially installed carrier's shield spring and make it unusable. Ensure that the adjacent drive carrier is fully installed. |
If the hard drive fails the hard-drive tests or does not operate properly, see Getting Help.
If you are using the optional SAS backplane, the SATA hard drives you install are hot-pluggable if the backplane is attached directly to the SAS controller card on the system board (see Figure 3-13). For instructions on installing the optional SAS backplane board, see Removing and Installing the Optional SAS Backplane Board.
The SAS backplane supports up to four hot-plug hard drives connected to the optional SAS controller card. The SAS controller card must be connected to channel A on the optional SAS controller card, or port 0 on an optional RAID controller card. For instructions on installing the optional SAS backplane board, see Removing and Installing the Optional SAS Backplane Board.
The optional SAS backplane board supports hot-plug SAS or SATA drives (if an optional SAS controller card is installed in the system).
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-12. Installing the SAS Backplane Board
1 |
release tab |
2 |
power connector |
3 |
I2C connector |
4 |
data cable |
5 |
power cable |
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See Installing an Expansion Card for instructions about installing the card.
Installing SATA and SCSI hard drives in the same system is not supported.
Figure 3-13. SAS Backplane Connected to a SAS Controller Card
1 |
SAS backplane |
2 |
SATA hard drive (up to four) |
3 |
SAS interface cable |
4 |
SAS controller card |
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NOTICE: Not all operating systems support hot-plug drive installation. See the operating system documentation to confirm that the operating system supports this feature. |
If the drive has been online, the drive status indicator will blink green two times per second as the drive is powered down. When all indicators are off, the drive is ready for removal.
See your operating system documentation for more information on taking the hard drive offline.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-14. Removing the Cooling Shroud
1 |
shroud release tab |
2 |
anchor tabs (2) |
3 |
cooling shroud |
The system includes the following cooling fans:
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-15 illustrates the front system fan inside the system and the fan cable routing hole in the expansion-card guide bracket.
Figure 3-15. Front System Fan Power Cable
1 |
expansion-card guide bracket |
2 |
cable routing hole |
3 |
fan power cable |
4 |
release tabs (2) |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-16. Removing the Back System Fan
1 |
release tab |
2 |
fan cable connector |
3 |
BACK_FAN connector |
4 |
back system fan |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
To identify system board connectors, see System Board Connectors.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-17. Removing the Power Supply
1 |
power supply |
2 |
screws (4) |
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Your system supports up to five full-length expansion cards, installed in connectors on a riser card. The expansion slots are configured as follows:
Figure 3-18 shows the relative locations of the expansion-card slots.
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NOTICE: If you install a RAC card, it must be installed in PCI slot SLOT_5. |
1 |
SLOT_5 - PCI 32-bit, 33-MHz (5-V) |
2 |
SLOT_4 - PCI-X 64-bit, 133-MHz (3.3-V) |
3 |
SLOT_3 - PCI-X 64-bit, 133-MHz (3.3-V) |
4 |
SLOT_2 - x1 lane width PCI-Express |
5 |
SLOT_1 - x8 lane width PCI-Express |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
For instructions, see the documentation that accompanied the card.
See the documentation that accompanied the card for information about its cable connections.
Figure 3-19. Removing and Installing an Expansion Card
1 |
screw |
2 |
expansion card |
3 |
card-edge connector |
4 |
expansion-card connector |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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NOTICE: You must install a filler bracket over an empty expansion slot to maintain Federal Communications Commission (FCC) certification of the system. The brackets also help keep dust and dirt out of the system and aid in proper cooling and airflow inside the system. |
Figure 3-20. Replacing the SAS Controller Card Battery
1 |
chassis notches |
2 |
battery/battery holder |
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You can upgrade your system memory to a maximum of 8 GB by installing combinations of 512-MB, 1-GB, and 2-GB unbuffered ECC DDRII SDRAM 533- or 667-MHz memory modules. The system memory is located on the system board adjacent to the power supply connectors. See System Board Connectors. The memory module sockets are arranged in two banks on two channels (A and B). The memory module banks are identified as follows:
Table 3-2 shows examples of different memory configurations.
Table 3-2. Sample Memory Configurations
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-21. Installing and Removing a Memory Module
1 |
memory module |
2 |
memory module socket ejectors (2) |
3 |
socket |
4 |
alignment keys (2) |
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NOTE: The memory module socket has alignment keys that ensure correct insertion of the memory module in 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.
The system should have already changed the value to reflect the newly installed memory.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
You can upgrade the system processor to take advantage of future options in speed and functionality.
A processor upgrade kit contains the following items:
If your kit does not include a replacement heat sink, you must reuse the processor heat sink currently in your system.
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NOTICE: If your upgrade kit included a thermal grease packet, you must use the thermal grease as instructed to ensure the proper thermal operating condition for the processor. Failure to do so will result in damage to your system. |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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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. |
Figure 3-22. Removing the Heat Sink
1 |
heat sink |
2 |
securing clips (2) |
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Figure 3-23. Removing/Replacing the Processor
1 |
processor socket release lever |
2 |
processor cover |
3 |
pin-1 locators |
4 |
processor socket |
5 |
processor |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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NOTICE: You must position the processor correctly in the socket to avoid damaging the processor and the system board when you turn on the system. Be careful not to touch or bend the pins on the socket. |
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NOTICE: Do not operate the system without the heat sink installed. The heat sink is required to maintain proper thermal conditions. |
As the system boots, it detects the presence of the new processor and automatically changes the system configuration information in the System Setup program. A message similar to the following appears:
One 2.8 GHz Processor, Processor Bus: 533 MHz, L2 cache 256 KB
You can download the latest BIOS version from the Dell Support website located at support.dell.com
See Running the System Diagnostics for information on running the diagnostics and troubleshooting any problems that may occur.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
See Installing an Expansion Card for information on installing the card.
See the RAC card documentation for information on configuring and using the RAC card.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
See Using the System Setup Program.
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NOTICE: You must install the new system battery with the side labeled "+" facing up. See Figure 3-24. |
Figure 3-24. Removing the System Battery
1 |
system battery |
2 |
latch |
3 |
battery socket |
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
Figure 3-25. Removing the Control Panel Assembly
1 |
assembly cable guide bracket |
2 |
chassis floor |
3 |
control panel assembly |
4 |
control panel assembly cable |
5 |
mounting screws (2) |
6 |
chassis-intrusion switch |
The system board and system board tray are removed and replaced as a single assembly.
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CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. |
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CAUTION: The processor heat sink can get hot during operation. To avoid burns, ensure that the system has sufficient time to cool before removing the system board. |
Figure 3-26. Removing the System Board
1 |
system board |
2 |
plunger |
3 |
drive bay |
See Installing Memory Modules.
Ensure that you reattach the interface cables in their original locations.