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Dell Inspiron 3000 Service Manual

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    							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 beep code or sys-
    tem error message to occur and the probable causes of the fault in each case.
    If a faulty computer does not emit beep codes or display system error messages 
    to indicate a failure, you should load the diagnostics and run the appropriate 
    tests to help isolate the source of the problem. See “Running the Dell Diagnos-
    tics” found later in this chapter.
    POST Beep Codes        
    If the display cannot display error messages during POST, the computer may 
    emit a series of beeps that identify the problem or that can help you identify a 
    faulty component or assembly. The following table lists the beep codes that may 
    be generated during POST. Most beep codes indicate a fatal error that requires 
    replacement of the main board or other corrective actions before the computer 
    can operate. 
    						
    							3-2 Dell Inspiron 3000 Series Service Manual
         
    System 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 3-1.  POST Beep Codes     
    Beep Code Error Probable Causes
    1-2 Memory module not being 
    properly identified or usedFault
    y memory module or 
    fault
    y main board
    1-2-2-3 ROM BIOS checksum failure Fault
    y main board
    1-3-1-1 DRAM refresh failure Fault
    y main board
    1-3-1-3 Ke
    yboard controller test 
    failureFaulty keyboard or faulty 
    main board
    1-3-4-1 RAM failure on address line 
    nnnnFault
    y memory module or 
    fault
    y main board
    1-3-4-3 RAM failure on data bits 
    nnnn 
    of hi
    gh byte on memory 
    busFault
    y memory module or 
    fault
    y main board
    1-4-1-1 RAM failure on data bits 
    nnnn 
    of low b
    yte on memory 
    busFault
    y memory module or 
    fault
    y main board
    2-1-2-3 Check ROM co
    pyright notice 
    failureFaulty main board
    2-2-3-1 Interru
    pt mask register failure Faulty main board
    Table 3-2.  System Error Messages      
    Message Definition Probable Causes
    Diskette drive A 
    errorConnector loose or dis-
    kette fault
    y. Cannot 
    access diskette drive.Fault
    y or incorrectly 
    inserted diskette in 
    drive. Fault
    y diskette 
    drive. Fault
    y main 
    board. Fault
    y or loose 
    external cable.
    Extended RAM 
    failed at off-
    set: 
    nnnn
    Extended memory not 
    confi
    gured properly or 
    failed at memor
    y 
    address nnnn
    .Fault
    y or improperly 
    seated memor
    y mod-
    ule. Fault
    y main board. 
    						
    							Beep Codes and Error Messages 3-3
    Failing bits: 
    nnnn 
    Memory failed at RAM 
    address nnnn.Faulty or improperly 
    seated memory mod-
    ule. Faulty main board.
    Fixed disk 0 
    failureHard-disk drive not 
    responding to 
    commands from 
    computer.Corrupted hard-disk 
    drive boot sector or 
    configuration file. 
    Faulty hard-disk drive. 
    Faulty main board.
    Fixed disk con-
    troller failureHard-disk drive or con-
    troller not responding to 
    commands from 
    computer.Faulty hard-disk drive. 
    Faulty main board.
    Incorrect drive A 
    type—run SetupDiskette drive not iden-
    tified properly in the 
    Setup program. Incorrect drive 
    configuration. Faulty 
    connections. Faulty dis-
    kette drive. Faulty main 
    board.
    Keyboard control-
    ler errorKeyboard controller  
    faulty.Faulty keyboard 
    connection. Faulty key-
    board. Faulty main 
    board. 
    Keyboard errorKeyboard 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 foundOperating system can-
    not be found on 
    hard-disk drive or on 
    diskette in diskette 
    drive.Incorrect drive 
    configuration. Operat-
    ing system not installed 
    on hard-disk drive or 
    diskette drive not 
    bootable. Faulty con-
    nections. Faulty drive. 
    Faulty main board.
    Parity check 1 
    nnnn
    Parity error in system 
    bus at address nnnn. Faulty main board.
    Parity check 2 
    nnnn
    Parity error in I/O bus 
    at address nnnn.Faulty main board.
    Table 3-2.  System Error Messages  (continued)
        
    Message Definition Probable Causes 
    						
    							3-4 Dell Inspiron 3000 Series Service Manual
    Running 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 board
    •Video — Tests the video subsystem
    •Keyboard — Tests the keyboard subsystem
    Real time clock 
    errorCMOS battery that 
    supports data stored in 
    NVRAM may be dead.Faulty battery. Faulty 
    main board.
    Shadow RAM failed 
    at offset: 
    nnnn
    Shadow RAM failed at 
    address nnnn.Faulty or improperly 
    seated memory mod-
    ule. Faulty main board.
    System battery is 
    dead—Replace and 
    run SetupCMOS battery dead. Faulty CMOS battery 
    or main board.
    System cache 
    error—cache 
    disabledPrimary cache failed. Faulty microprocessor. 
    System CMOS 
    checksum bad—run 
    SetupCMOS has been cor-
    rupted or modified, 
    possibly by an applica-
    tion program that 
    changes data stored in 
    CMOS.BIOS has been updated.
    Verify correct CMOS 
    settings, save, and exit.
    System RAM failed 
    at offset: nnnnMemory not operating 
    correctly. System RAM 
    failed at address nnnn 
    in the 64-KB block at 
    which error was 
    detected.Faulty or improperly 
    seated memory mod-
    ule. Faulty main board.
    System timer 
    errorTimer circuit on main 
    board malfunctioning.Faulty main board.
    CAUTION: To prevent damage to the original diagnostics diskette,
    always use a backup copy of the diagnostics diskette when servicing a
    user’s computer. Dell recommends that users make several copies of this
    diskette to ensure that one is always available.
    Table 3-2.  System Error Messages  (continued)
        
    Message Definition Probable Causes 
    						
    							Beep Codes and Error Messages 3-5
    •Mouse — Tests the mouse/touch pad subsystem
    •Diskette Drives — Tests the diskette drive subsystem
    •Hard-Disk Drives (Non-SCSI) — Tests the IDE hard-disk drive subsystem
    •IDE CD ROM Drives — Tests a CD-ROM drive subsystem 
    •Serial/Infrared Ports — Tests the serial communications port
    •Parallel Ports — Tests the parallel communications port
    •Audio — Tests the operation of the audio chip set
    •SCSI Devices — Tests a SCSI hard-disk drive subsystem 
    NOTE: This test does not apply to Dell Inspiron 3000 computers.
    •Network Interface — Tests a network controller and its associated interface 
    NOTE: This test does not apply to Dell Inspiron 3000 computers.
    Before starting the Dell Diagnostics, you must configure the computer cor-
    rectly. For more information, see “Before You Start Testing” in Chapter 4 of the 
    Reference and Troubleshooting Guide.
    To run the Dell Diagnostics completely, you must have an external diskette 
    drive with a diskette drive cable attached. 
    Follow these steps to start the diagnostics: 
    1. Install a CD-ROM drive in the options bay.
    2. Attach the external diskette drive cable to the parallel port connector on the 
    back of the computer.
    3. Turn off the computer.
    4. Place a copy of the Dell Diagnostics Diskette in the diskette drive, and boot 
    the computer.
    Starting the diagnostics causes the Dell logo screen to appear, followed by a 
    message indicating that the diagnostics is loading. Before the diagnostics loads, 
    a program tests the portion of main memory (RAM) required for loading the 
    diagnostics. If a main memory error is detected, a message appears on the 
    screen telling you a memory module has failed.
    If no errors are found in main memory, the diagnostics loads, and the Diagnos-
    tics Menu appears. This menu lets you choose the following options or exit to 
    the MS-DOS
    ® prompt:   
    •Run Quick Tests — Runs preselected tests to quickly locate a computer fail-
    ure or to indicate where further testing is needed to isolate a failure
    •Run All Tests — Runs all tests for a thorough test of the computer
    •Run Specific Tests — Tests a particular area or subsystem of the computer 
    						
    							3-6 Dell Inspiron 3000 Series Service Manual 
    						
    							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 peripherals are turned off and the peripher-
    als are disconnected from the computer’s I/O panel.
    •A part can be replaced or installed by performing the removal procedure in 
    reverse order.
    When performing the procedures in this chapter that require the display assem-
    bly to be open, use a book or something similar to support the display assembly. 
    The angle of the display assembly with respect to the base assembly should not 
    exceed 180 degrees for a 12.1-inch LCD and 170 degrees for a 13.3-inch LCD. 
    Also, assume that locations or directions relative to the computer are as shown 
    in Figure 4-1 unless otherwise specified in a procedure.
    Figure 4-1.  Computer Orientation  
    Recommended Tools     
    Most of the procedures require the use of one or more of the following tools:
    •Small flat-blade screwdriver
    •Number 1 magnetized Phillips-head screwdriver
    •Antistatic grounding strap
    •Dental pick
    right side  left side back of computer
     front of computer 
    						
    							4-2 Dell Inspiron 3000 Series Service Manual
    •Small scribe (or Delrin [plastic] screwdriver)
    •Nut drivers (4 mm and 5 mm)
    Screw Identification and Tightening
    .
    Figure 4-2.  Screw Identification (Example)     
    Where applicable, information about screw lengths is provided in illustrations. 
    Before installing a screw, match the screw to the screw length graphics provided 
    to check for correct length.CAUTION: It is essential that the correct length screw be used when
    reinstalling a screw. Otherwise, hardware damage could result. Make
    sure that the screw is properly aligned with its corresponding hole, and
    avoid overtightening.
    B1
    (screw B1 is 12 mm)
    12 mm 
    						
    							Removing and Replacing Parts 4-3
    Precautionary Measures     
    Before performing any of the procedures in this chapter, read the following 
    warning.
    Follow these precautionary measures before removing or replacing any parts 
    that are described in this chapter:
    1. Determine the power state of the computer.
    If the display is on, go to step 2.
    Check the status display window to determine the status of the computer. If 
    the display is off, press the power key to verify that the computer is not in 
    suspend or standby mode. Then proceed to step 2.
    2. Turn off any attached peripherals, and then shut down the computer.
    3. Disconnect the computer and any attached peripherals from AC power 
    sources to reduce the potential for personal injury or shock.
    If the computer has an AC adapter, disconnect the adapter from the AC 
    power source, and then disconnect the AC adapter from the computer or 
    from the port replicator (see Figures 4-3 and 4-4). WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION
    OF THE EQUIPMENT: Before you start to work on the computer, per-
    form the following steps in the sequence indicated.
    1. Turn off the computer and any attached peripherals.
    2. Disconnect the computer and any attached peripherals from AC 
    power sources to reduce the potential for personal injury or shock.
    3. Ground yourself by attaching an antistatic grounding strap to your 
    wrist and to an unpainted metal surface on the computer’s I/O panel. 
    If an antistatic grounding strap is not available, periodically dis-
    charge static electricity from your body by touching one of the 
    connectors on the I/O panel. 
    						
    							4-4 Dell Inspiron 3000 Series Service Manual
          
    Figure 4-3.  AC Adapter Removal
    4. If the computer is connected to a port replicator, remove the computer from 
    the re
    plicator.
    Figure 4-4.  Computer Removal From Replicator
    5. Remove the main battery from the battery compartment.    
    Unlock the latch lock (see Fi
    gure 4-5). Slide the latch toward the back of the 
    com
    puter (the latch does not move all the way to the lock groove). Keep 
    holdin
    g the latch with one hand while pulling the battery straight out to 
    release the batter
    y. Then slide the battery out of the compartment.
    AC power cable (to AC power source)
    AC adapter
    AC adapter cable
    release handle 
    						
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