Dell Inspiron Cp Service Guide

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							__________________
Information in this manual is subject to change without notice.
© 1994–1998 Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: 
Dell, the DELL logo, and Latitude are registered trademarks of Dell Computer Corporation; Microsoft, Windows, Windows NT, and MS-DOS are registered trademarks of Microsoft Corporation; Intel and Pentium are registered trademarks and MMX is a trademark 
of Intel Corporation; IBM is a registered trademark of International Business Machines Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell 
Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
August 1998     P/N 54724  Rev. A02  
						

							v
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System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-1
Physical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-2
Indicator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-4
Power Indicator  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-4
Drive Activity Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-4
Battery Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-4
Keyboard Indicators   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-5
Controlling Computer Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-5
Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-6
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-7
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Initial User Contact  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-1
Visual Inspection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-2
Observing the Boot Routine  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-4
Eliminating Resource Conflicts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-6
Getting Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2-6
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POST Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3-1
Battery Failure Codes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3-4
System Error Messages  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3-5
Running the Dell Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3-9
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Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-2
Precautionary Measures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-2
Screw Identification and Tightening  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-3
ZIF Connectors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-4
Field-Replaceable Parts and Assemblies   . . . . . . . . . . . . . . . . . . . . . . . . . .  4-5
Removing Field-Replaceable Parts and Assemblies  . . . . . . . . . . . . . . . . .  4-14 
						

							vi
Hard-Disk Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-15
Memory Module Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-16
Memory Modules  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-17
Keyboard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-18
Back Cover Assembly  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-20
Palmrest Assembly  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-21
Touch-Pad Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-23
Power Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-24
Display Assembly Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-25
Display Assembly  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-27
Display Assembly Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-29
Display Assembly Latch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-30
LCD Panel    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-31
12.1-Inch LCD Displays  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-31
13.3-Inch LCD Displays  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-32
LCD Inverter Board  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-35
12.1-Inch LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-35
13.3-Inch LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-36
Display-Assembly Interface Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-37
LCD Display Hinge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-38
Display-Assembly Top Cover   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-39
Bottom Case Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-40
Modular Bay Devices (Diskette Drive, 
CD-ROM Drive, Battery, or Travel Module)   . . . . . . . . . . . . . . . . . . . .  4-42
Audio Shield   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-43
Audio Board   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-44
Bottom Case Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-45
Module Latch Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-46
Speakers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-47
System Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-48
Exhaust Fan   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-50
I/R Board  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-51
Reserve Battery   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-52
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Figure 1-1. Front View of the Computer   . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-2. Back View of the Computer  . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 1-3. Bottom View of the Computer  . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 1-4. Indicator Panel   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure 3-1. Battery Indicator  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Figure 4-1. Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Figure 4-2. Main Battery Assembly Removal  . . . . . . . . . . . . . . . . . . . . . . 4-3 
						

							vii
Figure 4-3. Screw Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Figure 4-4. Disconnecting an Interface Cable . . . . . . . . . . . . . . . . . . . . . . 4-4
Figure 4-5. Exploded View—Computer . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Figure 4-6. Hard-Disk Drive Assembly Removal . . . . . . . . . . . . . . . . . . . 4-15
Figure 4-7. Memory Module Cover Removal  . . . . . . . . . . . . . . . . . . . . . 4-16
Figure 4-8. Memory Module Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Figure 4-9. Removing the Keyboard Assembly Screws  . . . . . . . . . . . . . 4-18
Figure 4-10. Keyboard Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Figure 4-11. Back Cover Assembly Removal  . . . . . . . . . . . . . . . . . . . . . . 4-20
Figure 4-12. Palmrest Assembly Removal  . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Figure 4-13. Touch-Pad Interface Module Removal  . . . . . . . . . . . . . . . . . 4-23
Figure 4-14. Exploded View—Display Assembly 
(12.1-Inch Display Shown)   . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Figure 4-15. Exploded View—Display Assembly 
(13.3-Inch Display Shown)   . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Figure 4-16. Display Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Figure 4-17. Display Assembly Bezel Removal 
(12.1-Inch Display Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Figure 4-18. LCD Panel Removal (12.1-Inch Display)  . . . . . . . . . . . . . . . . 4-31
Figure 4-19. LCD Panel Removal (13.3-Inch Display)  . . . . . . . . . . . . . . . . 4-32
Figure 4-20. Magnet Holder  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Figure 4-21. LCD Inverter Board Removal (12.1-Inch Display)  . . . . . . . . . 4-35
Figure 4-22. LCD Inverter Board Removal (13.3-Inch Display)  . . . . . . . . . 4-36
Figure 4-23. Display-Assembly Interface Cable Removal 
(12.1-Inch Display Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37
Figure 4-24. Bottom Case Assembly  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
Figure 4-25. Modular Bay Device Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-42
Figure 4-26. Audio Board Removal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Figure 4-27. Bottom Case Bracket Removal   . . . . . . . . . . . . . . . . . . . . . . 4-45
Figure 4-28. Module Latch Assemblies Removal  . . . . . . . . . . . . . . . . . . . 4-46
Figure 4-29. Left Slider  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Figure 4-30. System Board Assembly Removal  . . . . . . . . . . . . . . . . . . . . 4-48
Figure 4-31. Exhaust Fan Removal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50
Figure 4-32. I/R Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-51
Figure 4-33. Reserve Battery Installation  . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
7DEOHVTable 1-1. Interrupt Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Table 1-2. Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Table 3-1. POST Error Codes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Table 3-2. Battery Failure Codes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-3. System Error Messages  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 4-1. Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 
						

							viii
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A prerequisite for using this manual to service Dell computer systems is a basic 
knowledge of IBM®-compatible PCs and prior training in IBM-compatible PC 
troubleshooting techniques. In addition to information provided in this manual 
and the 
User’s Guide that came with the system, Dell provides the Diagnostics 
and Troubleshooting Guide
 for troubleshooting procedures and instructions on 
using the Dell diagnostics to test the computer system.
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Throughout this manual, there may be blocks of text printed in bold type or in 
italic type. These blocks are warnings, cautions, and notes, and they are used 
as follows:
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NOTE: A NOTE provides helpful information about using the computer system. 
						

							System Overview 1-1
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This chapter provides an overview of the features and specifications of the 
Dell® Latitude® CP and CPi portable computers.
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In addition to the standard features found in a Dell portable computer, the 
Latitude CP and CPi include the following new features:
‡A Mobile Intel® Pe nt iu m® II microprocessor 233, 266, or 300 MHz or an 
Intel Pentium microprocessor with MMX technology 166, 200, or 233 MHz, 
with 32 KB of internal cache.
‡A 512-KB or 256-KB pipelined-burst SRAM external cache.
‡PCI bus architecture that increases system performance.
‡A PC Card controller that supports the CardBus standard for 32-bit data 
transfer.
‡Support for up to 128 MB of system memory. 
‡A CD-ROM drive for use in the modular bay. 
‡Support for a hard-disk drive in the modular bay.
‡A 13.3-inch XGA (1024 x 768) active-matrix (TFT) color display, a 12.1-inch 
SVGA (800 x 600) active-matrix (TFT) color display, or a 12.1-inch SVGA 
(800 x 600) HPHC dual-scan (STN) color display.
‡A Sound Blaster Pro-compatible integrated audio controller with voice and 
music functions.
‡Support for a zoom video PC Card in the upper PC Card connector.
‡Jacks for connecting external speakers or headphones, a microphone, and 
record/playback devices to the computer.
‡Software wavetable support and SRS 3-D audio control.
‡A lithium ion battery with a built-in charge gauge and ExpressCharge tech-
nology that charges the battery in about an hour (when the computer is in 
suspend mode [or standby mode for the Microsoft
® Windows® 98 operat-
ing system] or turned off).
‡Support for a battery in the modular bay. When used with the computers 
main battery, a second battery doubles battery operating time. 
						

							1-2 Dell Latitude CP and CPi Service Manual 
‡Two power management modes¾suspend mode (or standby mode in 
Windows 98) and suspend-to-disk mode¾that help you conserve battery 
power.
‡Automatic thermal management that slows the microprocessor or starts a 
small fan when necessary. 
‡An infrared port compatible with IrDA 1.1 (Fast IR) and 1.0 standards, and a 
USB connector that supports stand-alone and hub devices.
‡A PC Card slot with two connectors that support 5-V and 3.3-V PC Cards.
‡A BIOS that resides in flash memory and that can be upgraded by diskette 
if required.
‡A PS/2-compatible touch pad with full mouse functionality.
‡Hardware and software support for the Dell Latitude C/Port Advanced Port 
Replicator (APR) and Latitude C/Dock Expansion Station. 
For a complete list of system features, see “Technical Specifications” found 
later in this chapter.
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display
power button
batter y bayindicator 
panel display latch
keyboard
touch pad
audio jacks (3)
speakers (2) modular bay microphone
AC adapter connectorcooling-fan air intake touch pad 
buttons (2) 
						

							System Overview 1-3
    
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parallel connector
 infrared port USB connector
docking connector door
PC Card slotspeaker
hard-disk drive security cable slot
PS2 connector monitor connector serial connector docking connector fan outlet
modular 
bay latch
battery bay latchmemory module cover
hard-disk drive 
						

							1-4 Dell Latitude CP and CPi Service Manual 
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The Latitude CP or CPi computer has three indicators on the display assem-
bly’s indicator panel and three on the keyboard assembly. The following 
subsections describe the functions of these indicators.
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The power indicator is a green LED. After the computer is turned on, the power 
indicator lights up constantly to indicate that the computer is receiving stable 
power. If the power indicator is off, the computer is either in suspend mode (or 
standby mode for Windows 98), suspend-to-disk mode, or off.
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The drive activity indicator is a green LED. The indicator lights up when data is 
being transferred to or from the hard-disk drive, or to or from a diskette drive, 
CD-ROM drive, or other device installed in the modular bay. 
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The battery indicator displays the following conditions:
‡The indicator turns green while the AC adapter is fast-charging. During the 
normal charging cycle, the indicator remains on without blinking. After the 
battery is fully charged, the battery indicator blinks green to indicate that 
the AC adapter is providing a maintenance (trickle) charge to keep the bat-
tery at full capacity.
power indicator
drive activity indicatorbatter y indicator
numbers lock indicatorcapitals lock indicator scroll lock indicator