Page 3 - Contents
v Contents Chapter 1System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 5 - Index
vii Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 Cache Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 6 - Tables
viii 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 F...
Page 8 - ead This First
R ead This First W arnings, Cautions, and Notes 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: NOTE: A NOTE provides helpful information about using the computer system. A prere...
Page 11 - Chapter 1; System Overview; ystem Features
System Overview 1-1 Chapter 1 System Overview T he 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...
Page 12 - hysical Description; Figure 1-1. Front View of the Portable Computer
1-2 Dell Latitude LM Systems Service Manual 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 parall...
Page 13 - Status Display; Keyboard Indicators; Caps Lock Indicator; to toggle between the; Scroll Lock Indicator
System Overview 1-3 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 sourc...
Page 14 - Diskette-Drive Access Indicator
1-4 Dell Latitude LM Systems Service Manual 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 ...
Page 15 - Battery Charge Gauge; assword; An indicator with one bar on the left means a battery is
System Overview 1-5 Battery Charge Gauge There is a battery charge gauge on the main and second-ary battery. When you press the battery test button (labeled “PUSH”), the appropriate indicator lights up for a few seconds to indicate the amount of charge remaining in the battery. P assword CAUTION: De...
Page 16 - ystem Power; Power Conservation
1-6 Dell Latitude LM Systems Service Manual S ystem 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 ...
Page 17 - nterrupt Assignments
System Overview 1-7 I nterrupt 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 po...
Page 18 - echnical Specifications; pairs
1-8 Dell Latitude LM Systems Service Manual T echnical 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 . . . . ....
Page 19 - music functions
System Overview 1-9 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...
Page 20 - combinations
1-10 Dell Latitude LM Systems Service Manual Video Video type. . . . . . . . . . . . . . . . 64-bit (128-bit hardware accelerated) PCI Video controller . . . . . . . . . . . NeoMagic 2070 Video memory . . . . . . . . . . . . 896 KB Active-Matrix Display Type . . . . . . . . . . . . . . . . . . . . a...
Page 21 - through key combinations
System Overview 1-11 Dual-Scan Display (Continued) Dot pitch . . . . . . . . . . . . . . . . . 0.29 mm Power consumption. . . . . . . . . 3.4 W Controls . . . . . . . . . . . . . . . . . . brightness and contrast can be controlled through key combinations Keyboard Number of keys . . . . . . . . . . ...
Page 22 - to 10 hours with two batteries
1-12 Dell Latitude LM Systems Service Manual Main Battery Type . . . . . . . . . . . . . . . . . . . . lithium ion Dimensions: Height . . . . . . . . . . . . . . . . 22.0 mm (0.86 inch) Depth . . . . . . . . . . . . . . . . 219.0 mm (8.62 inches) Width . . . . . . . . . . . . . . . . 57.8 mm (2.27 i...
Page 24 - that simulates air shipment
1-14 Dell Latitude LM Systems Service Manual Environmental (Computer) Temperature: Operating . . . . . . . . . . . . . 5 ° to 35 ° C (41 ° to 95 ° F) Storage . . . . . . . . . . . . . . . -20 ° to 50 ° C (-4 ° to 122 ° F) Relative humidity . . . . . . . . . . 10% to 90% (noncondensing) Maximum vibra...
Page 25 - Chapter 2; Initial Procedures; nitial User Contact; Ask the user to back up any data on the hard-disk drive if the com-; Can the user duplicate the problem?; Observe the user to determine whether he or she is making an error,; Is the problem a result of user error?; isual Inspection
Initial Procedures 2-1 Chapter 2 Initial Procedures T his chapter describes initial procedures that can help you diagnose a com- puter problem. These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the computer. Dell recom-mends that you...
Page 26 - Determine the power state of the computer.
2-2 Dell Latitude LM Systems Service Manual components, as instructed in the following procedure, see Chapter 4, “Remov-ing and Replacing Parts.” To perform a visual inspection, follow these steps: 1. Determine the power state of the computer. If the display is on, go to step 2. If the display is of...
Page 27 - If an external monitor is connected, verify the following:; Yes. Proceed to the next section, “Observing the Boot Routine.”; bserving the Boot Routine; Turn off the computer and any attached peripherals.
Initial Procedures 2-3 12. If an external monitor is connected, verify the following: a. The monitor’s interface cable is properly attached to the external- monitor connector on the computer’s I/O panel. b. The monitor’s power cable is attached to a power source and is free of any obvious physical d...
Page 28 - Watch the indicators at the top of the keyboard. Depending on how; and reboot the computer.; Yes. See “Running the Dell Diagnostics” in Chapter 3.
2-4 Dell Latitude LM Systems Service Manual 3. Watch the indicators at the top of the keyboard. Depending on how your computer is configured, after various indicators flash momen-tarily in the status display panel, some indicators should light up and remain on. Do these indicators light up within se...
Page 29 - liminating Resource Conflicts
Initial Procedures 2-5 E liminating Resource Conflicts Devices within or connected to the computer may require dedicated memory spaces, interrupt levels, and/or DMA channels. Because different devices can be configured at different times, it is possible the same resource is assigned to two or more d...
Page 31 - Chapter 3; Beep Codes and Error Messages; OST Beep Codes
Beep Codes and Error Messages 3-1 Chapter 3 Beep Codes and Error Messages T his chapter describes beep codes and system error messages that can occur during system start-up or, in the case of some failures, during normal computer operation. The tables in this chapter list faults that can cause a bee...
Page 33 - ystem Error Messages; nnnn
Beep Codes and Error Messages 3-3 S ystem Error Messages The following table lists (in alphabetical order) system error messages that may appear on the display during the boot routine or during normal computer operation. Table 3-2. System Error Messages Message Definition Probable Causes Diskette dr...
Page 34 - Keyboard error
3-4 Dell Latitude LM Systems Service Manual Keyboard error Keyboard not respond-ing correctly. Built-in keyboard: Faulty keyboard or key pressed while com-puter booting. External keyboard: Cable or connector loose. Faulty keyboard or key pressed while computer booting. Operating system not found Ope...
Page 35 - BIOS has been updated.
Beep Codes and Error Messages 3-5 System CMOS checksum bad—run Setup CMOS has been cor-rupted or modified, pos-sibly by an application program that changes data stored in CMOS. BIOS has been updated. System RAM failed at off-set: nnnn Memory not operating correctly. System RAM failed at address nnnn...
Page 36 - unning the Dell Diagnostics; NOTE: This test does not apply to Dell Latitude LM computers.
3-6 Dell Latitude LM Systems Service Manual R unning the Dell Diagnostics The Dell diagnostics contains tests that aid in troubleshooting the computer. The diagnostics diskette contains the following test groups: • RAM — Tests the main memory • System Set — Tests the primary functions of the main bo...
Page 37 - Chapter 4; Removing and Replacing Parts; ecommended Tools; Small flat-blade screwdriver
Removing and Replacing Parts 4-1 Chapter 4 Removing and Replacing Parts T his chapter provides procedures for removing and replacing components, assemblies, and subassemblies. Unless otherwise noted, each of the procedures in this chapter assumes the following: • The computer and any attached periph...
Page 38 - Nut drivers; crew Identification and Tightening
4-2 Dell Latitude LM Systems Service Manual • Small scribe (or Delrin [plastic] screwdriver) • Nut drivers • Chip removal tool S crew Identification and Tightening . Figure 4-2. Screw Identification Where applicable, information about screw lengths is provided in illustrations. Before installing a s...
Page 39 - recautionary Measures
Removing and Replacing Parts 4-3 P recautionary Measures Before performing any of the procedures in this chapter, read the following warning. 1. Determine the power state of the computer. If the display is on, go to step 2. If the display is off, press any key on the keyboard to verify that the com-...
Page 41 - Remove any PC Cards
Removing and Replacing Parts 4-5 Keep holding the latch with one hand while pulling the device (diskette drive, secondary battery, or CD-ROM) straight out of the options bay with the other. Figure 4-6. Diskette Drive, Secondary Battery, or CD-ROM Removal 7. Remove any PC Cards To remove a PC Card fr...
Page 42 - IF Connectors; Grasp the interface cable and pull it out of the connector.
4-6 Dell Latitude LM Systems Service Manual Z IF Connectors Some of the computer’s interface connectors are zero insertion force (ZIF) con-nectors. These connectors are not removable; they must be released to disconnect a cable from them. To disconnect an interface cable from a ZIF connector, follow...
Page 43 - xploded Views of Components and Assemblies
Removing and Replacing Parts 4-7 E xploded Views of Components and Assemblies . Figure 4-9. Exploded View—Computer LCD panel assembly keyboard bottom assembly diskette drive,secondary battery, or CD-ROM hard-disk drive main battery heat sink latch (2) power/ suspend indicator
Page 44 - Figure 4-10. Exploded View—LCD Assembly
4-8 Dell Latitude LM Systems Service Manual Figure 4-10. Exploded View—LCD Assembly front bezel LCD panel power/suspend indicator inverter board inverter board connector microphone latch back bezel LCD panel flex cable stiffener hinge (2)
Page 45 - Figure 4-11. Exploded View—Top Assembly
Removing and Replacing Parts 4-9 . Figure 4-11. Exploded View—Top Assembly keyboard flex cable keyboard LCD flex- cable cover power button keyboard screw cover (2) hinge cover touch pad button (2) touch pad touch-pad button board infrared lens infrared board plastic housing (2) status-display panel ...
Page 46 - Figure 4-12. Exploded View—Bottom Assembly
4-10 Dell Latitude LM Systems Service Manual . Figure 4-12. Exploded View—Bottom Assembly main board power board audio board cache board I/O panel door I/O bracket bottom assembly memory module cover processor board
Page 47 - actory Repair Parts and Assemblies; Table 4-1. Factory Repair Parts and Assemblies; AC Adapter, service kit; Main board
Removing and Replacing Parts 4-11 F actory Repair Parts and Assemblies This section contains a parts list and procedures for removing and replacing fac-tory components and subassemblies. This information is provided for reference only. Dell does not recommend removal and replacement of these parts i...
Page 48 - Board, status display panel; Diskette drive assembly
4-12 Dell Latitude LM Systems Service Manual Board Assemblies (Continued) Board assembly, 133-MHz, service kit SVC,SYS,PLN,LMP133ST Main board SYS,PLN,3.3V TFT LCD,LMP Processor board, 133-MHz CRD,PRCR,LMP133 Card, cache CRD,L2,CACHE,LMP Heat sink, microprocessor, subassembly SUBASSY,HTSNK,CPU,LMP B...
Page 50 - Cover, keyboard screws
4-14 Dell Latitude LM Systems Service Manual LCD Assembly LCD panel, active-matrix color display (TFT), 12.1” LCD,TFT,SVGA,12.1”,LMP,IBM Board, TFT inverter CRD,INVRTR,TFT,LMP Cable, TFT flex CBL,LCD,FLEX,TFT,IBM,LMP Bezel, TFT front BZL,LCD,LMP,IBM Bezel, TFT back CVR,LCD,LMP,IBM LCD panel, dual-sc...
Page 51 - Service Manual
Removing and Replacing Parts 4-15 Miscellaneous Parts (Continued) Cover, flex-cable CVR,HNG,CTR,LMP Insulator, expansion connector INSUL,CON,DCKG,LMP Insulator, main board INSUL,MYLAR,I/O,LMP Bracket, I/O BRKT,I/O,LMP Door, I/O DOOR,I/O,LMP Door, memory module DOOR,RAM,LMP Guide, hard-disk drive, le...
Page 54 - eleting the Password; To delete the password, use the following procedure:; Open the computer and remove the keyboard.; See “Keyboard” found later in this chapter.; Place a short across the terminals of capacitor C146.
4-18 Dell Latitude LM Systems Service Manual D eleting the Password If a user forgets the password and does not have it backed up on diskette, the user must return the computer to the factory where a service provider will delete the password using the following procedure. The computer will then be r...
Page 55 - Gently pry the drive from the carrier with a small scribe.
Removing and Replacing Parts 4-19 H ard-Disk Drive Figure 4-14. Hard-Disk Drive Disassembly The hard-disk drive resides in a carrier that mounts in the computer’s hard-disk drive compartment on the front of the computer. Four screws secure the drive inside the carrier. A mylar insulator provides ele...
Page 56 - iskette Drive
4-20 Dell Latitude LM Systems Service Manual D iskette Drive Figure 4-15. Diskette Drive Assembly The diskette drive resides in a carrier that slides into the options drive bay on the right side of the computer. The diskette drive and carrier are replaced as a unit and are not disassembled. diskette...
Page 58 - emory Module; To remove a memory module, follow these steps:; Turn the computer over, and remove the two memory-module cover; 0 MB — Install two 16-MB memory modules.
4-22 Dell Latitude LM Systems Service Manual M emory Module . Figure 4-17. Memory Module Removal To remove a memory module, follow these steps: 1. Turn the computer over, and remove the two memory-module cover screws. 2. Remove the memory module cover. Grasp the two memory-module retainer clips and ...
Page 59 - CD Assembly; To remove the LCD assembly, follow these steps:; With the computer closed and the back facing you, remove the two
Removing and Replacing Parts 4-23 L CD Assembly The LCD assembly consists of the display assembly and its related components. The subsections that follow provide removal and replacement procedures for the components of the LCD assembly. Figure 4-18. LCD Assembly Removal To remove the LCD assembly, f...
Page 60 - Front Bezel; To remove the front bezel, follow these steps:; With the front facing you, open the computer
4-24 Dell Latitude LM Systems Service Manual Front Bezel NOTE: This figure shows the STN LCD assembly, which has the same front bezel as the TFT LCD assembly. Figure 4-19. Front Bezel Removal To remove the front bezel, follow these steps: 1. Remove the LCD assembly. See the previous section, “LCD As...
Page 61 - LCD Panel; To remove an LCD panel, follow these steps:
Removing and Replacing Parts 4-25 LCD Panel There are two types of LCD panels: the dual-scan color display (STN) and the active-matrix color display (TFT). The removal process for both LCD panels is the same. . Figure 4-20. LCD Panel Removal To remove an LCD panel, follow these steps: 1. Remove the ...
Page 62 - Inverter Board; To remove the inverter board, follow these steps:; Remove inverter board screws H15 and H16.; Microphone
4-26 Dell Latitude LM Systems Service Manual Inverter Board . Figure 4-21. Inverter Board Removal To remove the inverter board, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Remove the LCD panel. See the previous subsection, “LCD Panel.” 3. Discon...
Page 63 - LCD Assembly Latches; Figure 4-22. LCD Assembly Latches Removal; To remove the LCD assembly latches, follow these steps:; Place the back bezel down on a work surface.; Be careful not to lose the small spring that is part of each latch.
Removing and Replacing Parts 4-27 LCD Assembly Latches Figure 4-22. LCD Assembly Latches Removal To remove the LCD assembly latches, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Place the back bezel down on a work surface. 3. Use a scribe to pry ...
Page 64 - Power/Suspend Indicator; See “Front Bezel” found earlier in this section.
4-28 Dell Latitude LM Systems Service Manual Power/Suspend Indicator Figure 4-23. Power/Suspend Indicator Removal To remove the power/suspend indicator, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Remove the LCD panel. See “LCD Panel” found earl...
Page 65 - Back Bezel; To remove the back bezel, follow these steps:
Removing and Replacing Parts 4-29 Back Bezel Figure 4-24. Back Bezel Removal To remove the back bezel, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Remove the LCD panel. See “LCD Panel” found earlier in this section. NOTE: Be careful when removin...
Page 66 - eyboard; To remove the keyboard, follow these steps:
4-30 Dell Latitude LM Systems Service Manual K eyboard This section provides the removal procedure for the keyboard. Also, it includes the removal procedure for the heat sink. Figure 4-25. Keyboard Removal To remove the keyboard, follow these steps: 1. Open the computer. 2. Remove the keyboard screw...
Page 67 - Lift off the heat sink.; Disconnect the keyboard cable from the main board.
Removing and Replacing Parts 4-31 4. Remove heat sink screws S3 and S4. Lift off the heat sink. 5. Disconnect the keyboard cable from the main board. Use a small flat-blade screwdriver to release the ZIF connector securing the keyboard cable. 6. Remove the keyboard from the computer. CAUTION: Lift a...
Page 68 - op Assembly
4-32 Dell Latitude LM Systems Service Manual T op Assembly The top assembly consists of the plastic palm rest and its related components. The subsections that follow provide removal and replacement procedures for the components of the top assembly. Figure 4-26. Top Assembly Removal hinge cover (2) k...
Page 69 - To remove the top assembly, follow these steps:; Separate the top assembly from the bottom assembly.
Removing and Replacing Parts 4-33 To remove the top assembly, follow these steps: 1. Remove the LCD panel. See “LCD Panel” found earlier in this chapter. 2. Remove the keyboard. See the previous section, “Keyboard.” 3. Remove side screws SD1 and SD2. 4. Disconnect the touch pad connector. Use a smal...
Page 70 - Speakers; To remove the speakers, follow these steps:; Remove the speakers from the top assembly.
4-34 Dell Latitude LM Systems Service Manual Speakers Figure 4-27. Speakers Removal To remove the speakers, follow these steps: 1. Remove the top assembly. See the previous section, “Top Assembly.” 2. Remove speaker screws S5, S6, S22, and S23. Remove the plastic housing holding the speakers. 3. Dis...
Page 71 - Status Display Board; Figure 4-28. Status Display Board Removal; To remove the status display board, follow these steps:; tor from the status display board.
Removing and Replacing Parts 4-35 Status Display Board Figure 4-28. Status Display Board Removal To remove the status display board, follow these steps: 1. Remove the top assembly. See “Top Assembly” found earlier in this section. 2. Remove status-display board screws S7, S8, and S9. 3. Disconnect t...
Page 72 - See “Top Assembly” found earlier in this section.; Dislodge the I/R device from the recess on the top assembly.
4-36 Dell Latitude LM Systems Service Manual I/R Device Figure 4-29. I/R Device Removal To remove the infrared (I/R) device, follow these steps: 1. Remove the top assembly. See “Top Assembly” found earlier in this section. 2. Disconnect the I/R device connector from the status display board. 3. Disl...
Page 73 - Power Button; To remove the power button, follow these steps:; Remove the power button and spring from the top assembly.
Removing and Replacing Parts 4-37 Power Button Figure 4-30. Power Button Removal To remove the power button, follow these steps: 1. Remove the top assembly. See “Top Assembly” found earlier in this section. 2. Remove the status display board. See “Status Display Board” found earlier in this section....
Page 74 - Touch Pad; To remove the touch pad, follow these steps:; Remove the top assembly and turn it over.; Remove the touch pad bracket and touch pad from the top assembly.
4-38 Dell Latitude LM Systems Service Manual Touch Pad Figure 4-31. Touch Pad Removal To remove the touch pad, follow these steps: 1. Remove the top assembly and turn it over. See “Top Assembly” found earlier in this section. 2. Remove touch pad screws S11, S12, and S13. Place the touch-pad button b...
Page 75 - ottom Assembly
Removing and Replacing Parts 4-39 B ottom Assembly This bottom assembly consists of a plastic base, the main board, and the main board components. The subsections that follow provide removal and replace-ment procedures for the components of the bottom assembly. Figure 4-32. Bottom Assembly cache boa...
Page 76 - Processor Board; To remove the processor board, follow these steps:; Remove the processor board from the main board.
4-40 Dell Latitude LM Systems Service Manual Processor Board Figure 4-33. Processor Board Removal To remove the processor board, follow these steps: 1. Open the cover. 2. Remove the keyboard. See “Keyboard” found earlier in this chapter. 3. Remove the processor board from the main board. The process...
Page 77 - Power Supply Board; To remove the power supply board, follow these steps:; Remove the power supply board from the main board.
Removing and Replacing Parts 4-41 Power Supply Board Figure 4-34. Power Supply Board Removal To remove the power supply board, follow these steps: 1. Open the cover. 2. Remove the top assembly. See “Top Assembly” found earlier in this chapter. 3. Remove the power supply board from the main board. Th...
Page 78 - Audio Board; To remove the audio board, follow these steps:; Remove the cable from the audio board.
4-42 Dell Latitude LM Systems Service Manual Audio Board Figure 4-35. Audio Board Removal To remove the audio board, follow these steps: 1. Open the cover. 2. Remove the top assembly. See “Top Assembly” found earlier in this chapter. 3. Remove the cable from the audio board. 4. Remove the audio boar...
Page 79 - Main Board; To remove the main board, follow these steps:; Remove the black mylar cover on the PC Card cage.
Removing and Replacing Parts 4-43 Main Board Figure 4-36. Main Board Removal To remove the main board, follow these steps: 1. Open the cover. 2. Remove the top assembly. See “Top Assembly” found earlier in this chapter. 3. Remove the power supply board. See “Power Supply Board” found earlier in this...
Page 80 - Use a; Remove cover alignment screws S16 and S17.
4-44 Dell Latitude LM Systems Service Manual 6. Turn the computer around, open the I/O panel cover, and remove standoff nuts ST1, ST2, ST3, ST4, ST5, ST6, ST7, and ST8. Use a 3/16 nut driver to remove standoff nuts ST1 through ST6 and a 7/32 nut driver for ST7 and ST8. 7. Remove cover alignment scre...
Page 81 - Cache Board; To remove the cache board, follow these steps:; Remove the cache board from the main board.
Removing and Replacing Parts 4-45 Cache Board Figure 4-37. Cache Board Removal To remove the cache board, follow these steps: 1. Open the cover. 2. Remove the main board. See the previous subsection, “Main Board.” 3. Turn the main board over. 4. Remove the cache board from the main board. The cache ...