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Computer Cover cover-mounting screws (4) handle Figure 4-1. Computer Cover Removal To remove the computer cover, follow these steps: 1. Remove the four cover-mounting screws at the back of the computer. 2. Slide the cover backward about one inch, then grasp the front of the cover and the handle at the back of the cover and lift the cover straight up off the chassis. Removing and Replacing Parts 4-3

Section	Page
Dell® PowerEdge® 2100/180 and 2100/200 Systems	1
SERVICE MANUAL	1
DELL CONFIDENTIAL - Preliminary 4/19/00	1
Dell® PowerEdge® 2100/180 and 2100/200 Systems	1
Dell® PowerEdge® 2100/180 and 2100/200 Systems	3
SERVICE MANUAL	3
Information in this document is subject to change without notice.	4
” 1996 Dell Computer Corporation. All rights reserved.	4
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation...	4
Trademarks used in this text: Dell, the DELL logo, and PowerEdge are registered trademarks of Del...	4
Other trademarks and trade names may be used in this document to refer to either the entities cla...	4
September 1996 P/N 82502	4
Index	5
B	5
C	5
D	5
E	5
F	6
H	6
I	6
J	6
M	6
P	6
R	6
S	7
T	7
U	7
V	7
Chapter 1	9
System Overview 1-1	9
Chapter 2	10
Basic Troubleshooting 2-1	10
Chapter 3	10
Beep Codes and Error Messages 3-1	10
Chapter 4	10
Removing and Replacing Parts 4-1	10
Appendix A	11
System Setup Program A-1	11
Index	11
Figures	11
Tables	12
System Overview	15
System Features	16
Figure 1-1. Computer Orientation	17
Figure 1-2. Front-Bezel Features	17
Figure 1-3. Front/Right Side Internal View	18
Figure 1-4. Back/Left Side Internal View	19
System Memory	20
Advanced Expansion Subsystem	20
Integrated Server Management	20
Video Controller	21
Integrated SCSI Controller	21
SCSI Hard-Disk Drives	21
SCSI Configuration Guidelines	21
SCSI ID Numbers	22
Device Termination	22
Figure 1-5. SCSI Termination Jumper Examples	23
System Unit	24
System Power Supply	24
Table 1-1. DC Voltage Ranges	24
Pin Assignments for the DC Power Connectors	24
Figure 1-6. DC Power Connector P1	25
Figure 1-7. DC Power Connectors P2, P3, P4, P5, and P6	25
Figure 1-8. DC Power Connectors P7	26
DC Power Distribution	26
Figure 1-9. DC Power Cables	26
Figure 1-10. DC Power Distribution	27
System Board Layout	28
The subsections that follow provide service-related information about the system board components.	28
Figure 1-11. System Board Components	28
System Board Jumper	29
Figure 1-12. System Board Jumpers	29
Table 1-2. Jumper Descriptions	30
Interrupt Assignments	31
Table 1-3. Interrupt Assignments	31
DMA Channel Assignments	32
Table 1-4. DREQ Line Assignments	32
Technical Specifications	33
Table 1-5. Technical Specifications	33
Basic Troubleshooting	37
Initial User Contact	37
1. Ask the user to back up any data on the hard-disk drive if the system’s condition permits.	37
2. Ask the user to try to duplicate the problem by repeating the operations he or she was perform...	37
3. Observe the user to determine if he or she is making an error, such as typing an incorrect key...	37
External Visual Inspection	38
1. Turn off the system unit, the monitor, and all peripherals.	38
2. Verify that all power cables are properly connected to the system unit, the monitor and periph...	38
3. Verify that the keyboard and mouse interface cables are firmly attached to the proper connecto...	38
4. If present, verify that any network cables are attached properly.	38
5. Verify that any devices attached to the serial and parallel port connectors are properly conne...	38
6. Verify that the video interface cable is firmly attached to the connector on the back panel or...	38
7. Inspect all external monitor controls for any obvious damage or improper settings.	38
8. Inspect the keyboard to ensure that no keys are sticking.	38
9. Inspect the exterior of the system unit, including all controls and indicators, and all user-a...	39
Observing the Boot Routine	39
1. Insert the diagnostics diskette into drive A. Turn on all peripherals and the system unit. If ...	39
2. Check the power supply fan.	39
3. Watch the Num Lock, Caps Lock, and Scroll Lock indicators on the upper-right corner of the key...	39
4. During the boot routine, observe the system for any of the following:	40
5. Observe the monitor screen for the Diagnostics Menu.	40
6. Insert another copy of the diagnostics diskette into the diskette drive, and reboot the system.	40
Internal Visual Inspection	40
1. Turn off the system, including any attached peripherals, and disconnect all the AC power cable...	40
2. Remove the system unit cover.	40
3. Verify that the microprocessor, DIMMs, and expansion cards, are fully seated in their sockets ...	41
4. Verify that all jumpers are set correctly.	41
5. Check all cable connectors inside the system unit to verify that they are firmly attached to t...	41
6. Reinstall the system unit cover.	41
7. Reconnect the system unit and any attached peripherals to their power sources, and turn them on.	41
Eliminating Resource Conflicts	41
Running the Diskette-Based Diagnostics	42
Getting Help	42
Beep Codes and Error Messages	43
POST Beep Codes	43
Table 3-1. POST Beep Codes	43
System Error Messages	45
Table 3-2. System Error Messages	45
Removing and Replacing Parts	49
Recommended Tools	49
Precautionary Measures	50
1. Turn off the computer and any attached peripherals.	50
2. Disconnect the computer and any attached peripherals from their power sources to reduce the po...	50
3. Disconnect any communications cables.	50
4. Wear a wrist grounding strap, and clip it to an unpainted metal surface, such as the system po...	50
Computer Cover	51
Figure 4-1. Computer Cover Removal	51
1. Remove the four cover-mounting screws at the back of the computer.	51
2. Slide the cover backward about one inch, then grasp the front of the cover and the handle at t...	51
Front Bezel	52
Figure 4-2. Front Bezel Removal	52
1. Remove the computer cover.	52
2. Pry the front bezel loose with your finger tips and remove it from the chassis.	52
Front-Bezel Inserts	53
Figure 4-3. Front-Bezel Insert Removal	53
1. Remove the front bezel.	53
2. With the inside of the front bezel facing you; grasp the front bezel with both hands and place...	53
3. Push on the outside of the front-bezel insert (indicated by the two arrows); then twist the si...	53
Control Panel Assembly	54
Figure 4-4. Control-Panel Assembly Removal	54
1. Disconnect the control-panel assembly cable from the PANEL connector on the system board (see ...	54
2. Remove the screw holding the control panel assembly to the front of the computer chassis.	54
3. Lift the control panel assembly out of the two chassis tabs.	54
4. Remove the control-panel-assembly cable from the hole in the chassis.	54
Drives	55
Figure 4-5. Drive Hardware	55
Externally Accessible Drives	56
Figure 4-6. Externally Accessible Drives Removal	56
1. Disconnect the DC power cable and the interface cable from the back of the drive.	56
2. Press inward (toward center of drive) on the two drive-release tabs, and slide the drive out o...	56
3. Remove the drive-mounting rails and drive-mounting extensions (if present) from the drive (see...	56
4. If the drive is a SCSI drive, record the setting of the SCSI address jumpers and SCSI bus term...	57
5. If present, remove the 50-pin to 68-pin adapter from the SCSI connector on the back of the drive.	57
Figure 4-7. Drive-Mounting Rails and Extensions Removal	57
Hard-Disk Drives	58
Figure 4-8. Hard-Disk Drive Removal	58
1. Lay the computer on its right side.	58
2. Disconnect the DC power cable and the SCSI interface cable from the back of each hard-disk dri...	58
3. Remove the four mounting screws that attach the hard-disk drive bracket to the front of the co...	58
4. Slide the hard-disk drive bracket toward the back of the computer until the alignment tabs dis...	58
5. Remove the four hard-disk drive mounting screws from the hard-disk drive; then slide the drive...	58
6. Record the setting of the SCSI address jumpers and SCSI bus termination jumper.	58
Expansion Cards	59
Figure 4-9. Expansion Card Removal	59
1. Lay the computer on its right side.	59
2. Disconnect any cables attached to the expansion card you want to remove.	59
3. Remove the expansion-card retaining screw.	59
4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card conne...	59
System Power Supply	60
Figure 4-10. Power Supply Removal	60
1. Disconnect the AC power cable from the AC power connector on the back of the power supply.	60
2. Disconnect the DC power cables from the system board (see Figure 4-12), the externally accessi...	60
3. Remove the four power-supply mounting screws.	60
4. Slide the power supply forward about an inch to clear the retaining tabs, then lift it out of ...	60
System Cooling Fan	61
Figure 4-11. System Cooling-Fan Removal	61
1. Lay the computer on its right side.	61
2. Disconnect the system cooling-fan cable from the FAN connector on the system board (see Figure...	61
3. To loosen the system cooling fan from the chassis:	61
a. Push the plunger of each of the four push-fasteners toward the back of the chassis, using a sm...	61
b. From the outside-back of the chassis, pull the plungers completely out of the push-fasteners.	61
4. Remove the system cooling fan and the push-fastener barrels from the chassis.	61
System Board Components	62
Figure 4-12. System Board Components	62
DIMMs	63
Figure 4-13. DIMM Removal	63
Figure 4-14. DIMM Installation	63
Microprocessor/Heat Sink Assembly	64
Figure 4-15. Microprocessor Securing Clip Removal	64
1. Remove the system board assembly.	64
2. Lay the system board assembly on a flat surface.	64
3. Remove the microprocessor securing clip from the microprocessor/heat sink assembly.	64
4. Push outward and then upward on the release lever to rotate the lever to its fully vertical po...	64
5. Lift the microprocessor/heat sink assembly out of its socket (see Figure 4-16).	64
Figure 4-16. Microprocessor/Heat Sink Assembly	65
System Battery	66
Figure 4-17. System Battery Removal	66
1. If possible, enter the System Setup program, and make a printed copy of the System Setup scree...	66
2. Lay the computer on its right side.	66
3. Remove any expansion cards installed in the PCI expansion-card slots.	66
4. Remove the battery.	66
System Board Assembly	67
Figure 4-18. System Board Assembly Removal	67
1. Disconnect all cables from their connectors at the back of the computer.	67
2. Remove all of the expansion cards.	67
3. Lay the computer on its left side.	67
4. Remove the four system-board-assembly mounting screws.	67
5. Remove the system board assembly from the chassis as follows:	67
a. Slide the system board assembly about a half-inch toward the front of the system (to free the ...	67
b. Raise the top of the system board assembly up enough to allow access to the system board cables.	67
c. Disconnect the power cables, the control panel cable, the diskette drive interface cable, syst...	67
6. Lift the system board assembly away from the computer chassis.	67
System Board	68
Figure 4-19. System Board Removal	68
1. Remove the system board assembly.	68
2. Lay the system board assembly on a flat worksurface.	68
3. Remove the system-board mounting screw.	68
4. Slide the system board toward the front of the computer to disengage the system-board mounting...	68
5. Lift the system board out of the system-board mounting bracket.	68
Printed in the U.S.A.	70
P/N 82502	70