Dell POWEREDGE 300 User Manual

C H A P T E R 7  
Checking Inside the Computer  
Your Dell PowerEdge 300 system supports a variety of internal options that expand  
system capabilities. This file prepares you to install options inside the computer. It  
describes how to remove and replace the computer cover and rotate the power sup-  
ply away from the system board. It also familiarizes you with the internal components  
you may handle if you install Dell hardware options.  
Before You Begin  
To make working inside your computer easier, make sure you have adequate lighting  
and a clean work space. If you temporarily disconnect cables or remove expansion  
cards, note the position of the connectors and slots so that you can reassemble the  
system correctly.  
You will use the information in this section every time you install a hardware option  
inside your computer. Read this section carefully, because the information is not  
repeated in such detail elsewhere in this guide.  
Safety First—For You and Your Computer  
Working inside your computer is safe—if you observe the following precautions.  
WARNING: FOR YOUR PERSONAL SAFETY AND PROTECTION OF YOUR  
EQUIPMENT  
Before starting to work on your computer, perform the following steps in the  
sequence indicated:  
1. Turn off your computer and all peripherals.  
2. Disconnect your computer and peripherals from their AC power sources.  
Also, disconnect any telephone or telecommunication lines from the com-  
puter. Doing so reduces the potential for personal injury or shock.  
3. If you are disconnecting a peripheral from the computer or are removing a  
component from the system board, wait 10 to 20 seconds after disconnect-  
ing the computer from AC power before disconnecting the peripheral or  
removing the component to avoid possible damage to the system board.  
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Checking Inside the Computer  
7-1  
 
padlock ring  
security  
cable slot  
Figure 7-1. Padlock Installed  
3. Remove the cover.  
4. Facing the left side cover, press the release button (located at the bottom-left cor-  
ner of the front bezel) and lift the bottom of the cover, allowing it to pivot up  
toward you (see Figure 7-2).  
5. Disengage the tabs that secure the cover to the top of the chassis, and lift the  
cover away.  
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Checking Inside the Computer  
7-3  
 
release button  
Figure 7-2. Removing the Computer Cover  
Replacing the Computer Cover  
Use the following procedure to replace the computer cover:  
1. Check all cable connections, especially those that might have come loose during  
your work. Fold cables out of the way so that they do not catch on the computer  
cover. Make sure cables are not routed over the drive cagethey will prevent the  
cover from closing properly.  
2. Check to see that no tools or extra parts (including screws) are left inside the  
computer's chassis.  
3. Replace the cover.  
4. Facing the left side of the computer, hold the cover at a slight angle as shown in  
Figure 7-3, and then align the top of the cover with the top of the chassis. Hook  
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Installation and Troubleshooting Guide  
   
the tabs on the cover into the recessed slots on the computer chassis so that the  
tabs catch the hooks inside the slots.  
Pivot the cover down toward the bottom of the chassis and into position. Make  
sure the securing hooks at the bottom of the cover click into place.  
tabs (3)  
recessed slot  
Figure 7-3. Replacing the Computer Cover  
5. If you are using a padlock to secure your system, reinstall the padlock.  
NOTE: After removing and replacing the chassis, the chassis intrusion detector will  
cause the following message to be displayed at the next system start-up:  
ALERT! Cover was previously removed.  
6. Reset the chassis intrusion detector by entering the System Setup program and  
setting Chassis Intrusion to Not Detected. See Using the System Setup Pro-  
gramin your User's Guide for instructions.  
NOTE: If a setup password has been assigned by someone else, contact your net-  
work administrator for information on resetting the chassis intrusion detector.  
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Checking Inside the Computer  
7-5  
 
Inside Your Computer  
Figure 7-4 shows a side view of your computer to help you orient yourself when  
installing hardware options. Unless otherwise specified, locations or directions rela-  
tive to the computer are as shown.  
back of computer  
left side  
right side  
front of computer  
Figure 7-4. Computer Orientation View  
Figure 7-5 shows your computer with its cover removed. Refer to this illustration to  
locate interior features and components discussed in this guide.  
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Installation and Troubleshooting Guide  
 
power supply  
AC power  
receptacle  
external  
drive bays  
input/output  
(I/O) panel  
internal  
drive bays  
expansion  
card slots  
drive interface  
cable  
drive power cable  
system board  
security  
cable lock  
padlock ring  
Figure 7-5. Inside the Chassis  
The system board holds the computer's control circuitry and other electronic compo-  
nents. Some hardware options are installed directly on the system board. Drive  
support is as follows:  
The three 5.25-inch external drive bays provide space for up to three drives,  
including a 3.5-inch diskette drive (standard) and, typically, an optional CD-ROM  
drive and/or tape drive.  
The removable hard-disk drive cage provides space for up to three 1-inch hard-  
disk drives.  
When you look inside the computer, note the DC power cables leading from the  
power supply. The power cables supply power to the system board, drives, and any  
expansion cards that connect to external peripherals.  
The wide ribbon cables are the interface cables for internal drives. For the diskette  
drive, an interface cable connects each drive to an interface connector on the system  
board or on an expansion card. For IDE devices, interface cables connect the devices  
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Checking Inside the Computer  
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to an IDE connector on the system board. (For more information, see Chapter 9,  
Installing Drives.)  
During an installation or troubleshooting procedure, you may be required to change  
a jumper or switch setting. For information on the system board jumpers, see  
Appendix B, Jumpers, Switches, and Connectors.”  
Rotating the Power Supply Away From the  
System Board  
To access some components on the system board, you may have to rotate the sys-  
tem power supply out of the way. Use the following procedure to rotate the power  
supply:  
1. Remove the computer cover as instructed in Removing the Computer Cover”  
earlier in this chapter.  
2. Disconnect the AC power cable from the AC power receptacle on the back of the  
power supply (see Rotating the Power Supply).  
power supply  
AC power  
receptacle  
AC power  
cable  
DC power  
cables  
securing tab  
Figure 7-6. Rotating the Power Supply  
3. Free the power supply by pressing the securing tab labeled RELEASE,then  
rotate the power supply upward until it locks in one of its extended positions.  
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Installation and Troubleshooting Guide  
 
4. The power supply bracket has detents to hold the power supply up in one of sev-  
eral extended positions, which are especially useful when the chassis is standing  
upright.  
Removing and Replacing the Front Bezel  
The bezel is secured to the front of the chassis by two tabs and two hooks. The tab  
release for the bezel is at the top of the computer chassis and can be accessed only  
with the computer cover removed (see Replacing the Computer Cover). With the  
cover removed, release the bezel by pressing the tab release marked with the icon  
(see Figure 7-7).  
release tab  
retaining hooks (2)  
Figure 7-7. Removing the Front Bezel  
While pressing the tab release, tilt the bezel away from the chassis, disengage the  
two retaining hooks at the bottom of the bezel, and carefully pull the bezel away from  
the chassis.  
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Checking Inside the Computer  
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To replace the bezel, fit the two retaining hooks on the bezel into their corresponding  
slots at the bottom of the chassis. Then rotate the top of the bezel toward the chassis  
until the top tabs snap into their corresponding slots on the bezel.  
Removing and Replacing Front-Panel  
Inserts  
Empty 5.25-inch drive bays contain a front-panel insert to protect the inside of the  
computer from dust particles and also to ensure proper airflow within the computer.  
Before you install a drive in an empty drive bay, you must first remove the front-panel  
insert (see Figure 7-8).  
To remove the insert covering a drive bay, follow these steps:  
1. Turn off the system, including any attached peripherals, and disconnect all the AC  
power cables from their power sources.  
2. Remove the computer cover as instructed in Removing the Computer Cover,”  
earlier in this chapter.  
3. Remove the front bezel using the instructions in Removing and Replacing the  
Front Bezel,earlier in this chapter.  
4. With your thumbs, press in on each end of the insert until the insert snaps free of  
the bezel.  
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bezel  
posts (2)  
ring tabs (2)  
Figure 7-8. Removing a Front-Panel Insert  
To replace a front-panel insert, work from inside the bezel. Insert the two ring-tabs  
(one on each end of the insert) over the posts on the inside of the bay opening, and  
firmly press both ends of the insert into place.  
Responding to a Dell OpenManage Server  
Agent Alert Message  
The optional Dell OpenManage Server Agent management application monitors criti-  
cal system voltages, temperatures and the system cooling fan. It also generates alert  
messages that appear in the Simple Network Management Protocol (SNMP) trap log  
file. To see the trap log, select any enterprise under the SNMP trap log icon. More  
information about the Alert Log window and options is provided in the Dell Open-  
Manage Server Agent documentation found on the Dell OpenManage Server  
Assistant CD.  
support.dell.com  
Checking Inside the Computer 7-11  
 
Troubleshooting a Wet Computer  
Liquid spills, splashes, and excessive humidity can cause damage to the system. If an  
external device (such as a printer or an external drive) gets wet, contact the device  
manufacturer for instructions. If the computer gets wet, complete the following  
steps.  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
1. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from the electrical outlet. Remove the computer cover. See Removing the  
Computer Cover,earlier in this chapter.  
2. Let the computer dry for at least 24 hours.  
Make sure that it is thoroughly dry before proceeding.  
3. Remove all expansion cards installed in the computer.  
See Removing an Expansion Card,in Chapter 8.  
4. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
Does the system have power?  
Ye s . Go to step 6.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
5. Turn off the system, disconnect it from the electrical outlet, remove the computer  
cover, and reinstall all expansion cards you removed in step 4.  
See Installing an Expansion Card,in Chapter 8.  
6. Replace the computer cover, and reconnect the system to the electrical outlet.  
7. R u n t h e System Set test group in the Dell Diagnostics.  
See Chapter 5, Running the Dell Diagnostics.”  
Did the tests run successfully?  
Ye s . The system is operating properly.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
Troubleshooting a Damaged Computer  
If the computer was dropped or damaged while being moved, you should check the  
computer to see if it functions properly. If an external device attached to the computer  
is dropped or damaged, contact the manufacturer of the device for information on  
7-12 Installation and Troubleshooting Guide  
obtaining technical assistance from Dell. Follow these steps to troubleshoot a dam-  
aged computer:  
1. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from its electrical outlet.  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
2. Remove the computer cover.  
See Removing the Computer Cover,earlier in this chapter.  
3. Check all the board and card connections in the computer.  
4. Verify all internal cable and component connections.  
Make sure that all cables are properly connected and that all components are  
properly seated in their connectors and sockets.  
5. Replace the computer cover and reconnect the system to the electrical outlet.  
6. Run the System Set test group in the Dell Diagnostics.  
See Chapter 5, Running the Dell Diagnostics.”  
Did the tests run successfully?  
Yes . The system is operating properly.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
Troubleshooting the Battery  
If an error message indicates a problem with the battery, or if the System Setup pro-  
gram loses the system configuration information when the computer is turned off, the  
battery may be defective.  
Follow these steps to troubleshoot the battery:  
1. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from its electrical outlet.  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
2. Remove the computer cover.  
See Removing the Computer Cover,found earlier in this chapter.  
3. If an expansion card blocks your access to the battery, remove the expansion  
card.  
See Removing an Expansion Card,in Chapter 8, for instructions.  
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Checking Inside the Computer 7-13  
4. Check the connection of the coin cell battery to the system board.  
Is the battery firmly installed in the battery socket on the system board?  
Ye s . Go to step 6.  
No. Go to step 5.  
5. Reseat the battery in its socket.  
Is the problem resolved?  
Ye s . The battery was loose. You have fixed the problem.  
No. Continue with this procedure.  
WARNING  
There is a danger of a new battery exploding if it is incorrectly installed.  
Replace the battery only with the same or equivalent type recommended by  
the manufacturer. Discard used batteries according to the manufacturer's  
instructions.  
6. Replace the battery.  
See Replacing the System Battery,in Chapter 8, for instructions on replacing  
the battery.  
Is the problem resolved?  
Ye s . The battery's charge was low. You have fixed the problem.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
7. Reinstall the expansion cards removed in step 3, if applicable.  
8. Replace the system cover, and reconnect the system to the electrical outlet.  
Troubleshooting the Power Supply  
The system contains one 330-watt power supply that can be rotated up to provide  
access to the system board (see Figure 7-6).  
Troubleshooting Power Cable Connections  
Follow these steps to troubleshoot power cable connections:  
1. Check the power outlet and power cable (see Chapter 2, Checking Connections  
and Switches).  
2. Turn off the system, including any attached peripherals, and disconnect all the  
power cables from the electrical outlets.  
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CAUTION: See "Protecting Against Electrostatic Discharge" in the safety  
instructions at the front of this guide.  
3. Remove the computer cover. See Replacing the Computer Cover,found earlier  
in this chapter.  
4. Check the power cable connection to the POWER_1 connector on the system  
board.  
Troubleshooting the Cooling Fan  
If you experience trouble with the cooling fan, make sure the fan cable is plugged into  
the FAN connector on the system board.  
Troubleshooting Expansion Cards  
If an error message indicates an expansion-card problem or if an expansion card  
seems to perform incorrectly or not at all, the problem could be a faulty connection, a  
conflict with software or other hardware, or a faulty expansion card. Follow these  
steps to troubleshoot expansion cards:  
1. Start the Resource Configuration Utility (RCU), and verify that all ISA expansion  
cards have been configured correctly. Save the configuration before exiting the  
utility.  
See Using the Resource Configuration Utilityin the User's Guide for  
instructions.  
2. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from the electrical outlet.  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
3. Remove the computer cover and verify that each expansion card is firmly seated  
in its connector.  
See Removing the Computer Cover,found earlier in this chapter.  
Are the expansion cards properly seated in their connectors?  
Yes . Go to step 5.  
No. Go to step 4.  
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Checking Inside the Computer 7-15  
 
4. Reseat the expansion cards in their connectors.  
See Removing an Expansion Cardand Installing an Expansion Cardin Chap-  
ter 8 for instructions on removing and replacing expansion cards.  
Is the problem resolved?  
Ye s . The connection was loose. You have fixed the problem.  
No. Go to step 5.  
5. Verify that any appropriate cables are firmly connected to their corresponding  
connectors on the expansion cards.  
For instructions on which cables should be attached to specific connectors on an  
expansion card, see the expansion card's documentation.  
Are the appropriate cables firmly attached to their connectors?  
Ye s . Go to step 7.  
No. Go to step 6.  
6. Reconnect the cable connectors to the appropriate connectors on the expansion  
cards.  
Is the problem resolved?  
Ye s . The cable connections were loose. You have fixed the problem.  
No. Go to step 7.  
7. If applicable, inspect all jumpers and configuration switches on each expansion  
card.  
Most ISA expansion cards have configuration settings for an interrupt request  
(IRQ) line, a direct memory access (DMA) channel, and a base memory or basic  
input/output system (BIOS) address. To keep expansion cards from conflicting  
with each other, you need to know both the starting memory address and the  
amount of memory required by each card.  
For instructions on jumper and configuration settings, see the expansion card's  
documentation.  
Is each expansion card configured correctly?  
Ye s . Go to step 9.  
No. Go to step 8.  
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8. Reconfigure the card according to the instructions in the card's documentation.  
Is the problem resolved?  
Yes . The memory configuration of the card was incorrect. You have fixed the  
problem.  
No. Go to step 9.  
9. Remove all expansion cards.  
See Removing an Expansion Cardin Chapter 8 for information on removing  
expansion cards.  
10. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
11. Enter the System Setup program, and update the system configuration  
information.  
See Using the System Setup Programin the User's Guide for instructions.  
For any ISA expansion cards, run the RCU and update the configuration informa-  
tion. See Using the Resource Configuration Utilityin the User's Guide for  
instructions.  
12. Run the RAM test group in the Dell Diagnostics.  
See Chapter 5, Running the Dell Diagnostics.”  
Did the tests run successfully?  
Yes . Go to step 13.  
No. See Chapter 10, Getting Help,for information on obtaining technical  
assistance.  
13. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from the electrical outlet.  
14. Remove the computer cover, reinstall one of the expansion cards you removed in  
step 9, and repeat steps 10 through 12.  
15. Repeat steps 13 and 14 for each of the remaining expansion cards that you  
removed in step 9.  
Have you reinstalled all of the expansion cards without encountering a test  
failure?  
Yes . You have fixed the problem.  
No. See Chapter 10, Getting Help,for information on obtaining technical  
assistance.  
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Checking Inside the Computer 7-17  
Troubleshooting System Memory  
A system memory problem can be a faulty dual in-line memory module (DIMM) or a  
faulty system board. If a random-access memory (RAM) error message appears, the  
system probably has a memory problem.  
When you turn on or reboot the system, the <Caps Lock> and <Scroll Lock> indica-  
tors on the keyboard should flash momentarily and then turn off. If Num Lock in  
the System Setup program is set to On, the <Num Lock> indicator should flash  
momentarily and then remain on; otherwise, it should turn off. Abnormal operation of  
these indicators can result from a defective DIMM in socket DIMM_A.  
Follow these steps to troubleshoot system memory:  
1. Turn on the system, including any attached peripherals.  
Is there an error message indicating invalid system configuration information  
after the memory count is completed?  
Ye s . Go to step 2.  
No. Go to step 10.  
2. Enter the System Setup program and check the System Memory setting.  
See "Using the System Setup Program" in the User's Guide for instructions.  
Does the amount of memory installed match the System Memory setting?  
Ye s . Go to step 10.  
No. Go to step 3.  
3. Turn off the system, including any attached peripherals, and disconnect the  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
4. Remove the computer cover.  
See Removing the Computer Cover,earlier in this chapter.  
5. Remove the support panel.  
Turn the two thumbscrews on the support panel and pull the tabs on the right  
side of the panel out of the slots in the chassis.  
6. Reseat the DIMMs in their sockets.  
See Adding Memoryfor instructions on removing and replacing DIMMs.  
7-18 Installation and Troubleshooting Guide  
7. Replace the support panel.  
Align the panel so that the two tabs are to the right. Fit the tabs into the two slots  
on the chassis back and swing the panel closed. Secure the panel with the two  
thumbscrews.  
8. Replace the computer cover, reconnect the system to an electrical outlet, and  
turn on the system.  
9. Enter the System Setup program and check the System Memory setting again.  
Does the amount of memory installed match the System Memory setting?  
Yes . Go to step 10.  
No. Go to step 11.  
10. Reboot the system, and observe the monitor screen and the <Num Lock>,  
<Caps Lock>, and <Scroll Lock> indicators on the keyboard.  
Does the monitor screen remain blank, and do the <Num Lock>, <Caps Lock>,  
and <Scroll Lock> indicators on the keyboard remain on?  
Yes . Go to step 11.  
No. Go to step 13.  
11. Repeat steps 3 and 4.  
12. If possible, swap the DIMM in socket DIMM_A with one of the same capacity,  
reboot the system, and observe the monitor screen and the indicators on the  
keyboard.  
Is the problem resolved?  
Yes . You have fixed the problem.  
No. Go to step 13.  
13. Run the RAM test group in the Dell Diagnostics.  
See Chapter 5, Running the Dell Diagnostics.”  
Did the tests run successfully?  
Yes . You have fixed the problem.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
support.dell.com  
Checking Inside the Computer 7-19  
Troubleshooting the Video Subsystem  
Troubleshooting video problems involves determining which of the following is the  
source of the problem: the monitor, the monitor interface cable, the video memory, or  
the video logic of the computer. You can also have a high-resolution video expansion  
card installed, which overrides the video logic of the computer.  
The following procedure troubleshoots problems with the video memory and video  
logic only. Before you begin, perform the procedure found in Troubleshooting the  
Monitorin Chapter 6 to determine whether or not the monitor is the source of the  
problem.  
If you have a high-resolution video expansion card, first complete the steps in Trou-  
bleshooting Expansion Cardsin this chapter to verify that the card is configured and  
installed correctly.  
Follow these steps to troubleshoot the video subsystem:  
1. Run the Video test group in the Dell Diagnostics.  
See Chapter 5, Running the Dell Diagnostics.”  
Most of the tests in the Video test group are interactive; that is, you must  
respond before the diagnostics continues with the next test.  
Did the tests run successfully?  
Ye s . It is not a video hardware problem. See Chapter 4, Finding Software  
Solutions.”  
No. Go to step 2.  
2. Turn off the system, including any attached peripherals, and disconnect the  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
3. Remove the computer cover.  
See Removing the Computer Cover,found earlier in this chapter.  
4. Determine whether a video expansion card is installed.  
Is a video expansion card installed?  
Ye s . Go to step 5.  
No. The integrated video controller is faulty. See Chapter 10, Getting Help,for  
instructions on obtaining technical assistance.  
5. Remove the video expansion card, connect the monitor interface cable to the  
video connector on the computer's back panel.  
7-20 Installation and Troubleshooting Guide  
6. Replace the computer cover, reconnect the system to an electrical outlet, and  
turn on the system.  
Did the tests run successfully?  
Yes . The video expansion card is faulty. See Chapter 10, Getting Help,for  
instructions on obtaining technical assistance.  
No. See Chapter 10, Getting Help,for instructions on obtaining assistance.  
Troubleshooting the System Board  
A system board problem can result from a defective system board component, a  
faulty power supply, or a defective component connected to the system board. If an  
error message indicates a system board problem, follow these steps to troubleshoot  
the problem:  
1. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from its electrical outlet.  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
2. Remove the computer cover.  
See Removing the Computer Cover,found earlier in this chapter.  
3. Reseat the DIMMs in their sockets.  
See Adding Memory,in Chapter 8, for instructions on removing and replacing  
DIMMs.  
4. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
Is the problem resolved?  
Yes . You have fixed the problem.  
No. Go to step 5.  
5. Remove all expansion cards except the SCSI host adapter card and the video  
expansion card (if they are installed).  
6. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
7. For any ISA expansion cards, run the RCU and update the configuration  
information.  
See Using the Resource Configuration Utilityin the User's Guide for  
instructions.  
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Checking Inside the Computer 7-21  
8. Enter the System Setup program and update the system information.  
See Using the System Setup Programin the User's Guide for instructions.  
9. Run the System Set test group in the Dell Diagnostics.  
See Chapter 5, Running the Dell Diagnostics.”  
Did the tests run successfully?  
Ye s . Go to step 10.  
No. Go to step 15.  
10. Repeat steps 1 and 2.  
11. Reinstall one of the expansion cards you removed in step 5, repeat steps 6  
through 8, and continue with step 12.  
12. Run the System Set test group again.  
Did the tests run successfully?  
Ye s . Go to step 13.  
No. Go to step 14.  
13. Repeat step 11 for each of the remaining expansion cards you removed in step 5.  
Have you reinstalled all of the expansion cards without a test failure?  
Ye s . Go to step 14.  
No. One of the expansion cards is faulty. See Chapter 10, Getting Help,for  
instructions on obtaining technical assistance.  
14. Disconnect the keyboard and reboot the system.  
Does the system boot successfully to the operating system?  
Ye s . Go to step 15.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
15. Swap the keyboard with a comparable working keyboard and run the System Set  
test group again.  
Did the tests run successfully?  
Ye s . You have fixed the problem.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
7-22 Installation and Troubleshooting Guide  
Troubleshooting the Diskette Drive  
Subsystem  
If the monitor displays a system error message indicating a diskette drive problem  
during execution of either the boot routine or the Dell Diagnostics, the problem may  
be caused by any of the following conditions:  
The system configuration settings do not match the physical diskette subsystem  
configuration.  
The diskette drive cable is not properly connected or is faulty.  
An expansion card is interfering with proper drive operations.  
A diskette drive may be improperly configured.  
The diskette drive is faulty.  
The computer's power supply is not providing sufficient power for the drives.  
The computer's diskette drive logic is faulty.  
Follow these steps to troubleshoot the diskette drive subsystem:  
1. Enter the System Setup program, and verify that the system is configured cor-  
rectly for the Diskette Drive A setting.  
See Using the System Setup Programin the User's Guide for instructions.  
2. If the system configuration settings are incorrect, make the necessary correc-  
tions in the System Setup program, and then reboot the system.  
3. Run the Diskette Drives test group in the Dell Diagnostics to see whether the  
diskette drive subsystem now works correctly.  
See Chapter 5 Running the Dell Diagnostics,for more information.  
Did the tests run successfully?  
Yes . If you were in the middle of another procedure, continue with the next step  
in the procedure you were performing.  
No. Go to step 4.  
4. Turn off the system, including any attached peripherals, and disconnect the sys-  
tem from its electrical outlet.  
CAUTION: See “Protecting Against Electrostatic Discharge” in the safety  
instructions at the front of this guide.  
5. Remove the computer cover.  
See Removing the Computer Cover,found earlier in this chapter.  
support.dell.com  
Checking Inside the Computer 7-23  
6. Check the diskette drive cabling.  
Is the diskette drive securely connected to the diskette-drive interface cable  
connector?  
Is the diskette-drive interface cable securely connected to the interface connec-  
tor (labeled DISKETTE) on the system board?  
Is the drive's DC power cable firmly connected to the drive?  
Ye s . Go to step 8.  
No. Go to step 7.  
7. Reconnect the DC power cable connector.  
8. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
9. Run the Diskette Drives test group in the Dell Diagnostics to determine whether  
the diskette drive subsystem now works correctly.  
See Chapter 5, Running the Dell Diagnostics,for more information.  
Did the tests run successfully?  
Ye s . You have fixed the problem.  
No. Go to step 10.  
10. Repeat steps 4 and 5, and remove all expansion cards.  
See Removing an Expansion Cardin Chapter 8, for instructions.  
11. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
12. Run the Diskette Drives test group in the Dell Diagnostics to determine whether  
the diskette drive subsystem now works correctly.  
Did the tests run successfully?  
Ye s . An expansion card may be conflicting with the diskette drive logic, or you  
may have a faulty expansion card. Repeat steps 1, 2, and 3.  
No. Go to step 13.  
13. Repeat steps 4 and 5, and reinstall one of the expansion cards you removed in  
step 10.  
See Installing an Expansion Cardin Chapter 8, for instructions.  
14. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
7-24 Installation and Troubleshooting Guide  
15. Run the Diskette Drives test group in the Dell Diagnostics to determine whether  
the diskette drive subsystem now works correctly.  
Did the tests run successfully?  
Yes . Go to step 16.  
No. Go to step 17.  
16. Repeat steps 13 through 15 until all expansion cards have been reinstalled or until  
one of the expansion cards prevents the system from booting from the diagnos-  
tics diskette.  
17. Repeat steps 4 and 5. Verify that the drive's termination is enabled and that the  
drive-select jumper is set to the DS1 position.  
Some diskette drives may require you to remove the drive from the computer to  
change the drive's termination and drive-select settings.  
For information about removing and replacing diskette drives, see Installing a  
Drive in a 5.25-Inch Drive Bay.”  
For information about the drive's termination and drive-select settings, refer to  
the documentation for the drive.  
Is the drive configured correctly?  
Yes . See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
No. Go to step 18.  
18. Correct the drive-select jumper and drive termination settings.  
19. Replace the computer cover, reconnect the system to the electrical outlet, and  
turn on the system.  
20. Run the Diskette Drives test group in the Dell Diagnostics to see whether the  
diskette drive subsystem now works correctly.  
Did the tests run successfully?  
Yes . You have solved the problem.  
No. See Chapter 10, Getting Help,for instructions on obtaining technical  
assistance.  
support.dell.com  
Checking Inside the Computer 7-25  
7-26 Installation and Troubleshooting Guide  

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