Dell poweredge 2900 tower manual

Page 20 Figure Installing the Control Panel Assembly M3 x 12 T10 Torx panhead display module display module cable screw 2 control panel board M3 x 5 T10 Torx panhead control panel cable screw 3 system chassis display module label Tower-to-Rack Conversion Guide Installing the Shoulder Nuts plastic filler panel 3 shoulder nut 6 shoulder mount 6 Removing the Rack Doors You must remove the doors from the rack cabinet to provide access to the interior of the rack and to prevent damage to the doors while installing the system in the rack cabinet.

Installing the Rack Bezel To install the bezel, hook the right end of the bezel onto the chassis, then fit the free end of the bezel onto the system. Page 25 Printed in China. Printed on recycled paper. Print page 1 Print document 26 pages. Rename the bookmark. Delete bookmark? Cancel Delete. Delete from my manuals? Sign In OR. Don't have an account? Sign up! Restore password. Social Impact.

Customer Engagement. Dell Newsroom. Dell Technologies. Terms of Sale. High performance in a rackable tower, with plenty of room for expansion along with a wide variety of security, manageability, and serviceability features. Tech Specs. Storage Solutions. Dell recognizes the growing importance of information security and is committed to ensuring the confidentiality, integrity and availability of data.

The internal components on the PowerEdge III are physically and logically locked down, helping to prevent unauthorized access. This is particularly useful for customers using USB security tokens. The optional internal tape drive allows easy backup, archive and data recovery. Core Speed Displays the clock speed of the processor s. Bus Speed Displays the bus speed of the processor s. Enabled permits all logical processors to be used by the operating system. Only the first logical processor of each processor installed in the system is used by the operating system if Disabled is selected.

Virtualization Technology Disabled default Displays when the processor s support Virtualization Technology. Enabled permits virtualization software to use Virtualization Technology incorporated in the processor design.

This feature can only be used by software that supports Virtualization Technology. Adjacent Cache Line Prefetch Enabled default Enables or disables optimal use of sequential memory access. Disable this option for applications that require high use of random memory access. Hardware Prefetcher Enabled default Enables or disables the hardware prefetcher. If any of the CPUs do not support demand-based power management, the field will become read-only, and automatically set to Disabled.

Processor X ID Displays the family and model number of each processor. A submenu displays processor core speed, amount of level 2 cache, and number of cores. Using the System Setup Program 39 Integrated Devices Screen Table lists the options and descriptions for the information fields that appear on the Integrated Devices screen. This option appears only if a SAS Enabled default controller is installed.

Diskette Controller Auto default Enables or disables the system's diskette drive controller. When Auto is selected, the system turns off the controller when necessary to accommodate a controller card installed in an expansion slot.

You can also configure the drive as Read-Only, or Off. When using the Read-Only setting, the drive cannot be used to write to a disk. PXE support allows the system to boot from the network. Changes take effect after the system reboots. This field does not have user-selectable settings.

Using the System Setup Program Serial Communication Screen Table lists the options and descriptions for the information fields that appear on the Serial Communication screen. Failsafe Baud Rate default Displays the failsafe baud rate used for console redirection when the baud rate cannot be negotiated automatically with the remote terminal. This rate should not be adjusted.

System Security Screen Table lists the options and descriptions for the information fields that appear on the System Security screen. System Security Screen Options Option Description System Password Displays the current status of your system's password security feature and allows you to assign and verify a new system password. NOTE: See "Using the System Password" on page 43 for instructions on assigning a system password and using or changing an existing system password.

Setup Password Restricts access to the System Setup program in the same way that you restrict access to your system using the system password feature. NOTE: See "Using the Setup Password" on page 45 for instructions on assigning a setup password and using or changing an existing setup password. Using the System Setup Program 41 Table To lock the system password, assign a setup password in the Setup Password option and then change the Password Status option to Locked.

To unlock the system password, enter the setup password in the Setup Password field and then change the Password Status option to Unlocked. Power Button Turns system's power off and on. The button is enabled in the System Setup program. When disabled, the button can only turn on system power. Pressing this button halts the operating system and displays a diagnostic screen. AC Power Recovery Last default Determines how the system reacts when power is restored to the system. If system is set to Last, the system returns to the last power state.

On turns on the system after power is restored. When set to Off, the system remains off after power is restored. If your data requires more security, use additional forms of protection, such as data encryption programs. NOTICE: Anyone can access the data stored on your system if you leave the system running and unattended without having a system password assigned or if you leave your system unlocked so that someone can disable the password by changing a jumper setting.

Your system is shipped to you without the system password feature enabled. If system security is a concern, operate your system only with system password protection.

To change or delete an existing password, you must know the password see "Deleting or Changing an Existing System Password" on page If you forget your password, you cannot operate your system or change settings in the System Setup program until a trained service technician changes the password jumper setting to disable the passwords, and erases the existing passwords. See "Disabling a Forgotten Password" on page Using the System Password After a system password is assigned, only those who know the password have full use of the system.

When the System Password option is set to Enabled, the system prompts you for the system password after the system starts. When a system password is assigned, the setting shown for the System Password option is Enabled. If the setting shown for the Password Status is Unlocked, you can change the system password. If the Password Status option is Locked, you cannot change the system password.

When the system password feature is disabled by a jumper setting, the system password is Disabled, and you cannot change or enter a new system password.

When a system password is not assigned and the password jumper on the system board is in the enabled default position, the setting shown for the System Password option is Not Enabled and the Password Status field is Unlocked. To assign a system password: 1 Verify that the Password Status option is set to Unlocked. You can use up to 32 characters in your password. As you press each character key or the spacebar for a blank space , a placeholder appears in the field.

Using the System Setup Program 43 The password assignment is not case-sensitive. However, certain key combinations are not valid. If you enter one of these combinations, an error message appears. To erase a character when entering your password, press or the left-arrow key.

The setting shown for the System Password changes to Enabled. Exit the System Setup program and begin using your system. NOTE: Password protection does not take effect until you reboot the system.

When the Password Status option is set to Unlocked, you have the option to leave the password security enabled or to disable the password security. To leave the password security enabled: 1 Turn on or reboot your system by pressing.

To disable the password security: 1 Turn on or reboot your system by pressing. If an incorrect system password is entered, the system displays a message and prompts you to re-enter your password. You have three attempts to enter the correct password.

After the third unsuccessful attempt, the system displays an error message showing the number of unsuccessful attempts and that the system has halted and will shut down. This message can alert you to an unauthorized person attempting to use your system. Even after you shut down and restart the system, the error message continues to be displayed until the correct password is entered.

If you are asked to enter your setup password, contact your network administrator. If Not Enabled is displayed for the System Password option, the system password has been deleted. If Enabled is displayed for the System Password option, press the key combination to restart the system, and then repeat steps 2 through 5.

To assign a setup password, highlight the Setup Password option and press the or key. The system prompts you to enter and verify the password. If a character is illegal for password use, an error message appears. NOTE: The setup password can be the same as the system password. If the two passwords are different, the setup password can be used as an alternate system password. However, the system password cannot be used in place of the setup password.

The password assignment is not case-sensitive. After you verify the password, the Setup Password setting changes to Enabled. The next time you enter the System Setup program, the system prompts you for the setup password. A change to the Setup Password option becomes effective immediately restarting the system is not required. When you start the System Setup program, the program prompts you to enter a password. Using the System Setup Program 45 If you do not enter the correct password in three attempts, the system lets you view, but not modify, the System Setup screens—with the following exception: If System Password is not set to Enabled and is not locked through the Password Status option, you can assign a system password however, you cannot disable or change an existing system password.

The setting changes to Not Enabled. If your operating system begins to load before you press , allow the system to finish booting, and then restart your system and try again.

To upgrade or troubleshoot the system, remove the bezel and cover to access the drives and internal system components. Installing and Removing the Optional Bezel Rack 1 1 50 key lock Installing System Components 2 2 bezel rack 3 3 bezel slot 2 Removing the Tower Bezel 1 Unlock the keylock at the right side of the bezel.

See "Installing the Bezel" on page Installing and Removing the Peripheral Bay Panel Tower 2 1 3 4 5 1 tower bezel with peripheral bay panel 2 peripheral bay panel 4 bezel inside view 5 tab slot 2 3 tab 2 Installing the Peripheral Bay Panel Tower Only 1 With the bezel installed on the system, align the peripheral bay panel with the panel opening on the bezel and insert the panel, tab-end first, into the opening.

See Figure for rack systems or Figure for tower systems. To avoid injury, do not attempt to lift the system by yourself. Closing the System 1 Lift up on the cover latch. See Figure for the location of the lock slot on the back of the chassis. Installing System Components 53 Figure NOTE: For the tower orientation, drive bays 8 and 9 are reversed.

Hard-Drive Bay Numbers Rack 1 2 1 1x2 flex bay hard drives 2 1x8 backplane hard drives Before You Begin Hard drives are supplied in special hot-pluggable drive carriers that fit in the hard-drive bays.

The interposer card provides enhanced functionality that makes the SATA hard drive usable in some storage systems. NOTICE: Before attempting to remove or install a drive while the system is running, see the documentation for the optional SAS RAID controller daughter card to ensure that the host adapter is configured correctly to support hotplug drive removal and insertion. Doing so can cause a drive failure. When you format a high-capacity hard drive, allow enough time for the formatting to be completed.

Long format times for these drives are normal. A 9-GB hard drive, for example, can take up to 2. If you remove a hard-drive carrier from the system and do not reinstall it, you must replace the carrier with a drive blank. See "Removing the Bezel" on page Installing a Drive Blank The drive blank is keyed to ensure correct insertion into the drive bay.

To install a drive blank, insert the blank into the drive bay and press evenly on the ends of the blank until it is fully inserted and latched. When both drive indicators are off, the drive is ready for removal. See "Installing a Drive Blank" on page See "Removing a Drive Blank" on page Installing a Hot-Plug Hard Drive 1 2 1 drive carrier release handle 2 drive carrier b Insert the hard-drive carrier into the drive bay until the carrier contacts the backplane.

When aligned correctly, the rear of the hard drive will be flush with the rear of the hard-drive carrier. Installing System Components 59 Figure When aligned correctly, the rear of the interposer will be flush with the rear of the hard-drive carrier. If only one power supply is installed, it must be installed in the left power supply bay 1. If two power supplies are installed, the second power supply serves as a redundant, hot-plug power source. NOTICE: To ensure proper system cooling, the power supply blank must be installed on the unoccupied power supply bay in a non-redundant configuration.

The system is in the redundant mode when two power supplies are installed and both power supplies are connected to an AC power source. Remove and replace only one power supply at a time in a system that is powered on. NOTE: On a rack system, you may have to unlatch and lift the cable management arm if it interferes with power supply removal.

For a redundant system, you can leave the system running and proceed to the next step. Installing and Removing a Power Supply 3 1 2 4 5 6 1 power supply 2 handle 3 tab 4 power supply blank 5 screw 6 locking tab Installing a Power Supply 1 If you are adding a second power supply, remove the power supply blank. See "Removing the Power Supply Blank" on page Create a strain-relief loop in the cable at the back of the power supply and attach the cable to the cable retention bracket just past the loop.

See the Getting Started Guide. After installing a new power supply in a system with two power supplies, allow several seconds for the system to recognize the power supply and determine its status.

The power-supply status indicator turns green to signify that the power supply is functioning properly see Figure Installing System Components 63 Removing the Power Supply Blank Using a Phillips screwdriver, remove the screw on the left side of the blank, rotate the blank slightly to clear the bay, and remove from the chassis.

Remove the power supply blank only if you are installing a second power supply. Installing the Power Supply Blank To install the power supply blank, insert the tab on the right edge of the blank into the slot in the power supply bay wall. Rotate the blank into the power supply bay and secure with the Phillips screw. Figure shows the positions and identification numbers of the fans. See "Opening the System" on page NOTICE: Do not remove more than one fan at a time and do not operate the system with any fan removed for an extended period of time.

Overheating can occur, resulting in a system shutdown and loss of data. The fan will start when it seats into the connector. See "Closing the System" on page Installing System Components 65 Figure Installing and Removing a Fan From the Fan Brackets 1 2 3 4 1 fan 4 fan connector on system board 2 release latch 2 3 center fan bracket Removing or Installing the Cooling Shroud Fan CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system.

Overheating of the system can develop quickly resulting in a shutdown of the system and the loss of data. NOTE: Do not remove the cooling shroud from the system to perform this step. NOTICE: Do not remove more than one fan from the system at a time and do not operate the system with any fan removed for an extended period of time. Overheating can occur resulting in a system shutdown and loss of data.

Figure shows the relative locations of these expansion-card slots Figure Installing and Removing Expansion Cards 3 2 1 1 card-edge guide 2 expansion card 3 expansion-card retainer 4 Remove the filler bracket on the slot you will be using.

NOTE: Keep this bracket if 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. NOTE: Ensure that the expansion-card bracket is also inserted into the securing slot on the back of the expansion-card cage. Installing System Components 71 4 Unpack the tape drive and controller card, if applicable and configure the tape drive according to the documentation that came with the tape drive, based on the following guidelines: a Each device attached to a SCSI host adapter must have a unique SCSI ID number.

See "Installing an Expansion Card" on page NOTE: For a full-height tape backup unit, you must remove two filler plates. See "Removing and Installing a Fan" on page See "Removing the Center Fan Bracket" on page See "Replacing the Center Fan Bracket" on page Installing System Components 73 5 Disconnect the cables from the SAS controller daughter card on the expansion-bay bracket and pull the cables out of the way of the center fans.

Installing System Components Figure Installing and Removing the Diskette Drive 2 3 1 4 5 6 7 1 diskette drive 2 diskette drive ribbon cable 3 diskette drive power cable 4 diskette drive carrier 5 release tab 6 metal stop 7 drive bay tabs Installing System Components 75 Installing the Diskette Drive Into the Drive Carrier Place the diskette drive into the drive carrier with the connectors toward the back, align the screw holes, and secure with the three Phillips screws.

Installing the Diskette Drive Into the Drive Carrier 1 2 3 4 1 screws 3 4 diskette drive 2 diskette drive carrier 3 plastic latch Installing the Diskette Drive CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Otherwise, do the following: 76 a Disconnect the cables from the SAS controller daughter card on the expansion-bay bracket and pull the cables out of the way of the center fan bracket.

Installing System Components 5 To remove the diskette drive filler plate, pull the retention spring slightly away from the filler plate, then lift the filler plate from the carrier. See "Removing an Expansion Card" on page Installing System Components 77 5 Remove the system battery. NOTICE: To avoid damage to the battery connector, you must firmly support the connector while installing or removing a battery.

The fan need not be removed prior to removing the shroud. Allow time for the DIMMs to cool before handling them. Installing System Components 79 Figure Installing and Removing the Fan Brackets and Cooling Shroud 1 2 3 8 4 7 5 6 80 1 cooling shroud latch left 4 7 cooling shroud 3 cooling shroud latch right back fan bracket release latch 5 back fan bracket 6 center fan bracket chassis slot center fan bracket release latch 2 Installing System Components 2 8 Installing the Cooling Shroud To install the cooling shroud, align the rails on the right side of the shroud with the tracks on the right chassis wall and then slowly lower the shroud straight down into the system until the fan connector engages and the latches snap into place.

Then slide the bracket straight up and out of the system. If the bracket does not disengage completely, push down slightly on the bracket when releasing the latches. Replacing the Center Fan Bracket 1 Align the rails on each end of the fan bracket with the guide rails on the chassis walls and lower the bracket down into the system until the latches engage.

See "Removing the Cooling Shroud" on page Replacing the Back Fan Bracket 1 Slide the left and right edges of the bracket into the two corresponding channels on the inside of the system chassis back panel. The memory sockets are located on the system board beneath the cooling shroud. NOTICE: If you remove your original memory modules from the system during a memory upgrade, keep them separate from any new memory modules that you may have.

The memory module sockets are arranged on the system board in two equal branches 0 and 1. The first DIMM socket of each channel has white release tabs. FBDs can be either single-ranked or dual-ranked.

FBDs marked with a 1R are single-ranked and modules marked with a 2R are dual-ranked. For best system performance, all four, eight, or twelve FBDs should be identical memory size, speed, and technology. Non-Optimal Memory Configurations System performance can be affected if your memory configuration does not conform to the preceding installation guidelines. Your system may issue an error message during startup stating that your memory configuration is non-optimal. Memory Sparing Support The system supports memory sparing if eight or twelve identical memory modules are installed in the system.

The memory sparing feature must be enabled in the System Setup program and can be used only if memory mirroring is not enabled. Memory sparing allocates four ranks of DIMM memory to the spare bank of memory sparing. These four ranks consist of the first rank of memory in DIMM sockets 1 through 4. Table shows how memory sparing splits the available and spared memory in each of the single- and dual-ranked memory module combinations.

Mirroring must be enabled in the System Setup program and can be used only if memory sparing is not enabled. In a mirrored configuration, the total available system memory is one-half of the total installed memory. Installing System Components 85 Figure Installing and Removing a Memory Module 1 4 3 2 1 memory module 4 memory module socket ejectors 2 2 alignment key 3 socket 6 Align the memory module's edge connector with the alignment key on the memory module socket, and insert the memory module in the socket.

NOTE: The memory module socket has an alignment key that allows you to install the memory module in the socket in only one way. 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. Repeat step 2 through step 12 of this procedure, checking to ensure that the memory modules are firmly seated in their sockets. Installing System Components 87 Figure Be particularly careful that you do not push or bend the system capacitors near the connectors. Microprocessor You can upgrade the system processor s to take advantage of future options in speed and functionality, or add a second processor.

Each processor and its associated internal cache memory are contained in a land grid array LGA package that is installed in a ZIF socket on the system board. Installing System Components 89 NOTICE: When you remove the heat sink, the possibility exists that the processor might adhere to the heat sink and be removed from the socket. It is recommended that you remove the heat sink while the processor is still warm.

The heat sink is necessary to maintain proper thermal conditions. Installing and Removing the Heat Sink 1 2 3 1 90 heat sink Installing System Components 2 heat-sink retention lever 2 3 retention lever latch 7 Wait 30 seconds for the heat sink to loosen from the processor.

Do not pry the heat sink off of the processor. Installing and Removing a Processor 1 5 4 2 3 1 socket-release lever 2 processor shield 4 ZIF socket 5 processor 3 socket key 2 13 Lift the processor out of the socket and leave the release lever up so that the socket is ready for the new processor. Bending the pins can permanently damage the system board. Installing System Components 91 16 Install the processor in the socket.

NOTICE: Positioning the processor incorrectly can permanently damage the system board or the processor when you turn it on. When placing the processor in the socket, be careful not to bend the pins in the socket. When the processor is positioned correctly, it engages easily into the socket. NOTE: If you did not receive a replacement heat sink, use the heat sink that you removed in step If you receive the processor without the thermal grease pre-applied, open the grease packet included with your processor kit and apply thermal grease evenly to the top of the processor.

As the system boots, it detects the presence of the new processor and automatically changes the system configuration information in the System Setup program. See "Running the System Diagnostics" on page for information about running the diagnostics and troubleshooting processor problems. NOTICE: If you completely remove the drives from the system, you must note the number of each drive and temporarily label them before removal, so you can replace them in the same locations.

Ensure that all cables are out of the way when installing the new backplane. Installing System Components 93 9 Replace the front bezel, if removed. The flex bay bracket is keyed for correct insertion into the flex bay. The drives must occupy drive bays 0 through 3. Installing System Components 97 3 Continue to hold the guide rails outward as you pull the SAS controller daughter card upward from the rails. See Figure and Figure Table provides a listing of the available configurations for your SAS storage, the number of cables required, and the number of hard drives supported in each configuration.

Installing System Components 99 Figure Cabling for each configuration is discussed in the following subsections. The order of boot devices is specified in the System Setup program. Figure illustrates a control panel assembly in the rack orientation.

Doing so can damage the cable. Removing the Control Panel Assembly 5 4 3 2 6 1 8 7 1 display module screws 2 2 display module 3 display module cable 4 control panel board 5 control panel cable 6 screws 3 7 system chassis 8 display module label Installing the Control Panel Assembly The following procedure applies to either a rack or tower system. Leave the RAC card attached to the expansion-bay bracket.

Squeeze the metal tabs on the ends of the RAC cable connector and gently work the connector out of the socket. See "Removing Memory Modules" on page See "Replacing a Processor" on page Removing the System Board 2 3 1 1 retention pin 2 system board 3 chassis hooks Installing the System Board CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. When the board is properly positioned, the tabs on the chassis will fit through the corresponding slots in the system board.

See "Installing Memory Modules" on page See "Installing the Cooling Shroud" on page See "Removing and Installing a Fan" on page 65 14 Reconnect all cables to the expansion cards. 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 "Removing a Power Supply" on page 62 9 Using a 2 Phillips screwdriver, remove the five screws from the power distribution board.

See "Installing the System Board" on page See "Installing a Power Supply" on page While working inside the system, do not attempt to service the system except as explained in this guide and elsewhere in your system documentation.

Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

Start-Up Routine Look and listen during the system's start-up routine for the indications described in Table An error message displayed on the monitor. See "System Messages" on page Alert messages from the systems management software. See the systems management software documentation. The monitor's power indicator. See "Troubleshooting the Video Subsystem" on page The keyboard indicators. See "Troubleshooting the Keyboard" on page The USB diskette drive activity indicator.

The diskette drive activity indicator. The CD drive activity indicator. See "Troubleshooting an Optical Drive" on page The hard-drive activity indicator. An unfamiliar constant scraping or grinding sound when you access a drive. Troubleshooting Your System Checking the Equipment This section provides troubleshooting procedures for external devices attached to the system, such as the monitor, keyboard, or mouse. Before you perform any of the procedures, see "Troubleshooting External Connections" on page Table lists the IRQ assignments.

Ensure that all external cables are securely attached to the external connectors on your system. See Figure for the front-panel connectors and Figure for the back-panel connectors on your system. Action 1 Check the system and power connections to the monitor. To verify that the monitor is connected to the correct video connector, turn off the system and wait for 1 minute, then connect the monitor to the other video connector and turn the system on again.

The system supports only one monitor attached to either the front or rear video connector. When a monitor is connected to the front panel, the back-panel video is disabled. If two monitors are attached to the system, disconnect one monitor.

If the problem is not resolved, continue to the next step. See "Using Server Administrator Diagnostics" on page If the tests run successfully, the problem is not related to video hardware.

If the tests fail, see "Getting Help" on page If the problem is resolved, replace the faulty keyboard. If the problem is not resolved, see "Getting Help" on page Action 1 Run the appropriate online diagnostic test. If the test fails, continue to the next step. If the mouse is not damaged, go to step 4.

If the mouse is damaged, continue to the next step. If the problem is resolved, replace the faulty mouse. Action 1 Enter the System Setup program and ensure that the serial port is enabled and configured correctly for your application.

Action 1 Turn off the system and any peripheral devices connected to the serial port. If the problem is resolved, replace the interface cable. If the problem is resolved, replace the serial device. If the problem is resolved, the USB connector might be defective. If the problem is resolved, replace the USB device. Remove and reinstall the drivers if applicable. See the NIC's documentation.

See the network equipment documentation. If the system does not start properly, see "Getting Help" on page This situation is caused by a defective battery. Action 1 Re-enter the time and date through the System Setup program.

If the date and time are not correct in the System Setup program, replace the battery. See "Replacing the System Battery" on page If the problem is not resolved by replacing the battery, see "Getting Help" on page NOTE: Some software may 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.

The power supply's fault indicator is lit. See "Power Indicator Codes" on page One power supply must be installed for the system to operate. The system is in the redundant mode when two power supplies are installed. Remove and install only one power supply at a time in a system that is powered on.

Operating the system for extended periods of time with only one power supply installed and without a power supply blank installed can cause the system to overheat. See "Power Supplies" on page NOTE: After installing a power supply, allow several seconds for the system to recognize the power supply and to determine if it is working properly.

The power indicator turns green to signify that the power supply is functioning properly. If not, remove the faulty power supply. See "Removing a Power Supply" on page See "Troubleshooting a Fan" on page To maintain proper cooling while the system is on, only replace one fan at a time.