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
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