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Information in this manual is subject to change without notice. © 1994–1996 Dell Computer Corporation. All rights reserved. Printed in the United States of America. 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; MS-DOS is a registered trademark of Microsoft Corporation; Intel and Pentium are registered
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Contents Chapter 1 System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Keyboard Indicators . . . . . . . . . . . . . . . . . . . . .
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Chapter 3 Beep Codes and Error Messages . . . . . . . . . . . . . . . . . . 3-1 POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Running the Dell Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Chapter 4 Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1 Recommended Too
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Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 Cache Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45 Index Figures Figure 1-1. Front View of the Portable Computer . . . . . . . . . . . . . . . . . . . 1-2 Figure 1-2. Back View of the Portable Computer . . . . . . . . . .
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Figure 4-29. I/R Device Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36 Figure 4-30. Power Button Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37 Figure 4-31. Touch Pad Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38 Figure 4-32. Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39 Figure 4-33. Processor Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40 Figure 4-3
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Read This First A prerequisite for using this manual to service Dell portable computers 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, Dell provides the Reference and Troubleshooting Guide for trouble- shooting procedures and instructions on using the Dell diagnostics to test portable computers, and the online System User’s Guide for information about system setup and operations. W
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Chapter 1 System Overview ® ® The Dell Latitude LM P-100SD and LM P-133ST are high-performance ® ® multimedia portable computers that use the Intel Pentium microprocessor. This chapter provides an overview of the components and subsystems of these computers. The individual model names within the Dell Latitude LM portable family indi- cate the type and operating frequency of the microprocessor and display used in the computer. For example: The Dell Latitude LM P-100SD contains a 100-MHz Pent
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warm swapping. However, the CD-ROM must be in the computer before or during boot in order for the drivers to load. • Built-in serial infrared transmitter/receiver, effective to 1 m (3.3 ft). • Support for connecting an external diskette drive to the parallel connector on the I/O panel. Physical Description LCD assembly power/suspend indicator status display panel latch (2) keyboard microphone hard-disk drive bay power button display close button touch pad button (2) options bay touc
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Status Display . Figure 1-3. Status Display Panel The status display panel is located directly above the keyboard. This panel shows icons that indicate keyboard operation or suspend mode; CD-ROM, hard-disk drive, diskette drive, and PC Card activity; and status of the power source (AC power or batteries). Keyboard Indicators The following icons indicate the status of the keyboard and whether the com- puter is in suspend mode. Caps Lock Indicator Press to activate this feature.
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Diskette-Drive Access Indicator This indicator blinks when data is being transferred to or from the internal diskette drive. PC Card Indicator This indicator blinks when the computer is accessing data from an installed PC Card or Cards. AC Power Indicator This indicator appears when the computer is receiving power through an AC power adapter. • If the icon is present but not blinking, the computer is on but the battery is not charging. • If the icon is blinking, the computer is on and the
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• The AC power indicator with the battery status in- dicator means the battery is defective. • An indicator with one bar on the left means a battery is too hot. Allow the battery to cool to room temperature. • The AC power indicator with the battery status in- dicator and one bar means that the battery is too hot (40° C [104° F] or more) to start charging. Charg- ing starts automatically when the battery cools to below 40° C. • An indicator with no bars means that battery power is low (abou
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System Power The power button controls power to the system. The computer receives power from either the AC adapter connected to an AC power source or from up to two batteries. If you use the AC adapter, constant power is available to the computer. If you use one or two batteries, the system has built-in power management fea- tures that extend battery life by removing power from parts of the computer that are not being used. Power Conservation Attach the AC power adapter to the com
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Interrupt Assignments Table 1-1. Interrupt Assignments IRQ Line Used/Available IRQ0 Generated by the system timer IRQ1 Generated by the keyboard controller to signal that the key- board output buffer is full IRQ2 Cascade to second interrupt controller IRQ3 Used by the infrared port (COM2) IRQ4 Used by the serial port (COM1) IRQ5 Used by the audio controller IRQ6 Generated by the diskette drive controller to indicate that the diskette drive requires the attention of the microprocessor IRQ7 Used
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Technical Specifications Table 1-2. Technical Specifications Microprocessor Microprocessor type. . . . . . . . Intel Pentium microprocessor Microprocessor speed. . . . . . . 100 or 133 MHz Internal cache memory . . . . . . 16 KB External cache . . . . . . . . . . . . 256 KB Math coprocessor . . . . . . . . . . internal to the microprocessor Chip Set and Bus System chip set. . . . . . . . . . . . Intel 430MX PCIset Data bus width . . . . . . . . . . . . 64 bits DRAM bus width . . . . . . . .
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Table 1-2. Technical Specifications (Continued) Memory (Continued) Memory access time: tRAC . . . . . . . . . . . . . . . . 70 ns tCAC . . . . . . . . . . . . . . . . 20 ns BIOS address . . . . . . . . . . . . . F000:0000 Connectors Serial (DTE) . . . . . . . . . . . . . . one 9-pin connector; 16,550-compatible, 16-byte buffer Parallel . . . . . . . . . . . . . . . . . . one 25-hole connector; unidirectional, bidirectional, EPP 1.9, or ECP Monitor . . . . . . . . . . . . . . . . . . one
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Table 1-2. Technical Specifications (Continued) Video Video type. . . . . . . . . . . . . . . . 64-bit (128-bit hardware accelerated) PCI Video controller . . . . . . . . . . . NeoMagic 2070 Video memory . . . . . . . . . . . . 896 KB Active-Matrix Display Type . . . . . . . . . . . . . . . . . . . . active-matrix color (TFT) Dimensions: Height . . . . . . . . . . . . . . . 184.5 mm (7.3 inches) Width . . . . . . . . . . . . . . . . 246.0 mm (9.7 inches) Diagonal . . . . . . . . . . . . . .
