Dell LM P-133ST manual Initial User Contact, Visual Inspection

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Chapter 2

Initial Procedures

This 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 perform these initial procedures in the order they are presented.

Initial User Contact

When you first contact a user who has a problem, ask the user to describe the problem and the conditions under which it occurs. A verbal description can often indicate the cause of a problem or indicate the appropriate troubleshooting procedure to use. After the user describes the problem, follow these steps:

1.Ask the user to back up any data on the hard-disk drive if the com- puter’s condition permits.

See the “Maintaining Your Computer” section of the online System’s User’s Guide.

2.Ask the user to try to duplicate the problem by repeating the operations he or she was performing at the time the problem occurred.

Can the user duplicate the problem? Yes. Proceed to step 3.

No. Proceed to the next section, “Visual Inspection.”

3.Observe the user to determine whether he or she is making an error, such as typing an incorrect key combination or entering a command incorrectly.

Is the problem a result of user error?

Yes. Instruct the user in the proper procedure or direct him or her to the appropriate user documentation for a description of the correct procedure.

No. Proceed to the next section, “Visual Inspection.”

Visual Inspection

The visual inspection consists of a quick inspection of the exterior of the com- puter and any attached peripherals, including making any necessary corrections. For information about the proper removal and installation of computer

Initial Procedures

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Contents 659,&0$18$ Page Contents Chapter Removing and Replacing Parts Chapter Beep Codes and Error MessagesFigures IndexTables Page Read This First Page Xii System Overview System FeaturesFront View of the Portable Computer Physical DescriptionStatus Display Keyboard IndicatorsDiskette-Drive Access Indicator Battery Charge Gauge PasswordPower Conservation System PowerInterrupt Assignments Interrupt AssignmentsTechnical Specifications Technical SpecificationsConnectors Video Keyboard Main Battery AC Adapter Environmental Computer Visual Inspection Initial User ContactPage If an external monitor is connected, verify the following Observing the Boot RoutineIf an external mouse is connected, verify the following Page Getting Help Eliminating Resource ConflictsPage Post Beep Codes Beep Codes and Error MessagesPost Beep Codes System Error Messages System Error MessagesParity error in system Faulty main board Timer circuit on main Faulty main board Running the Dell Diagnostics Recommended Tools Removing and Replacing PartsScrew Identification Screw Identification and TighteningMain Battery Removal Precautionary MeasuresHard-Disk Drive Removal Remove the hard-disk drive assemblyRemove any PC Cards Diskette Drive, Secondary Battery, or CD-ROM RemovalReleasing a ZIF Connector ZIF ConnectorsExploded View-Computer Exploded Views of Components and Assemblies10. Exploded View-LCD Assembly 11. Exploded View-Top Assembly 12. Exploded View-Bottom Assembly Factory Repair Parts and Assemblies Factory Repair Parts and AssembliesSVC,SYS,PLN,LMP133ST BRKT,HD,12.5MM,LMP LCD,TFT,SVGA,12.1,LMP,IBM CVR,HNG,CTR,LMP TSH,WUE,SVC,LMP Naming Conventions 13. Capacitor C146 Location Deleting the PasswordHard-Disk Drive Remove the hard-disk drive assembly from the computerLift the hard-disk drive out of the bottom case Diskette Drive 15. Diskette Drive AssemblyCD-ROM 17. Memory Module Removal Memory Module18. LCD Assembly Removal LCD AssemblyFront Bezel Remove the LCD assemblyRemove the front bezel LCD PanelMicrophone Inverter Board22. LCD Assembly Latches Removal LCD Assembly LatchesRemove the power/suspend indicator Power/Suspend IndicatorRemove the inverter board Back BezelRemove the latches 25. Keyboard Removal KeyboardRemove the keyboard from the computer Production Note Top AssemblyDisconnect the status-display board connector Separate the top assembly from the bottom assemblyRemove the top assembly from the computer Remove the keyboardSpeakers Remove the top assemblyStatus Display Board Remove the status display board from the top assemblyDevice Remove the I/R device from the top assemblyRemove power button Power ButtonRemove the power button and spring from the top assembly Remove the status display boardRemove the touch pad buttons Touch Pad32. Bottom Assembly Bottom AssemblyOpen the cover Remove the keyboard Processor BoardRemove the processor board from the main board Open the cover Remove the top assembly Power Supply BoardRemove the power supply board from the main board 35. Audio Board Removal Audio BoardMain Board Remove the power supply boardRemove the audio card Remove the black mylar cover on the PC Card cageRemove the main board Bend the options bay wall see FigureOpen the cover Remove the main board Cache BoardPage Index Eliminating resource conflicts Error messages, 3-3,3-6 Speaker removal Specifications technical Standby mode Status display board removal