Troubleshooting | Compaq N150 guide

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Troubleshooting

ÅWARNING: Only authorized technicians trained by Compaq should repair this equipment. All troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, no one should attempt to make repairs at the component level or to make modifications to any printed wiring board. Improper repairs can create a safety hazard. Any indication of component replacement or printed wiring board modification may void any warranty or exchange allowances.

Utilities that are preinstalled on the computer include:

PhoenixBIOS Setup Utility—Allows you to modify or restore factory default settings and configure the system BIOS to diagnose and solve minor problems.

Power Management—Allows you to reduce your computer power consumption. Power Management information is contained in Chapter 1.

	Security—Allows you to set or remove your power-on
	password.

Maintenance and Service Guide

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Compaq N150 manual Troubleshooting

Contents

Maintenance and Service Guide Page Contents Illustrated Parts Catalog Screw Listing Index Models and Features Product Description Models KeyKey Description Options T4X Taiwan Features Serial Power Management External Computer Components Front and Left Side Panel ComponentsComponent Function Front and Left Side Panel Components Right Side and Rear Panel Components Right Side and Rear Panel Components Right Side and Rear Panel Components Keyboard components are shown in -4 and described in Table Keyboard Components Fn key Top Components Top Components Top Components Bottom Components Bottom Components Bottom Components Design Overview Troubleshooting Using the PhoenixBIOS Setup Utility Troubleshooting Flowcharts Troubleshooting Flowcharts OverviewSection Description Initial Troubleshooting No Power, Part From Section No Power, Part Power outlet From Section No Power, Part Open Computer No Video, Part From Section No Video, Part Remove Reseat power Cord in docking Station Power outlet Non Functioning Docking Station if applicable No Operating System OS Loading No OS Loading from Hard Drive, Part From Section System Files on hard Drive? Install OS Reboot No OS Loading from Diskette Drive No OS Loading from CD- or DVD-ROM Drive No Audio, Part Undock From Section No Audio, Part Non Functioning Device Non Functioning Keyboard Non Functioning Pointing Device Network or Modem Connection Illustrated Parts Catalog Serial Number Location Computer System Major Components Computer System Major Components Computer System Major Components Computer System Major Components PC Card assembly Disk cell RTC batteryDescription Number Speakers Heat sink Computer System Major Components Battery packs Item Description Number Mini PCI Communications BoardsMedia Bay devices Base enclosure Miscellaneous Plastics Kit Components Miscellaneous Plastics Kit Components Spare Part NumberItem Description Miscellaneous Hardware Kit Components Miscellaneous Hardware Kit Components Spare Part Number Cable Kit Components Cable Kit Components Spare Part Number Mass Storage Devices Mass Storage DevicesDescription Number Diskette drive 239035-001 Hard drives Optical drives Miscellaneous Miscellaneous Spare Parts not illustrated Power cord, black, 6 feet Description Number External AC adapter50W slim AC adapter Logo kit Service Considerations Tools Required Cables and Connectors Preventing Damage to Removable DrivesPlastic Parts Maintenance and Service Guide Packaging and Transporting Precautions Preventing Electrostatic Damage Workstation Precautions Grounding Equipment and Methods Typical Electrostatic Voltage Levels Static-Shielding MaterialsRelative Humidity Event 10% 40% 55% Material Use Voltage Protection Level Removal and Replacement Procedures Serial Number Disassembly Sequence Chart Disassembly Sequence Chart# of Screws Section Description Removed Preparing the Computer for Disassembly Computer Feet Hinge Covers Removing the Hinge Covers Keyboard Keyboard Cover Spare Part Number Information Remove the two pewter M2.5 × 7.0 screws that secure Display Display Spare Part Number Information Reverse the above procedure to install the display EMI Shield Removing the EMI Shield Top Cover Top Cover Spare Part Number Information Removing the Top Cover Screws Disconnecting Top Cover Connectors 10. Removing the Top Cover TouchPad TouchPad Spare Part Number Information 11. Removing the TouchPad Screws Remove the TouchPad bracket and TouchPad from the top cover Speakers Speakers Spare Part Number Information 13. Routing the Speaker Cables 14. Removing the Speakers Microphone Reverse the above procedure to install the microphone Display Lid Switch Board 16. Removing the Display Lid Switch Board Heat Sink Heat Sink Reverse the above procedure to install the heat sink Infrared Board Infrared Board Spare Part Number Information Board to the base enclosure System Board System Board Spare Part Number Information 19. Removing the System Board Screwlocks 20. Removing the System Board Screws 21.Lifting the System Board Reverse the above procedure to install the system board PC Card Assembly PC Card Assembly Spare Part Number Information Reverse the above procedure to install the PC Card assembly Mini PCI Board Mini PCI Board Spare Part Number Information Reverse the above procedure to install the mini PCI board Disk Cell RTC Battery Disk Cell RTC Battery Spare Part Number Information 25. Removing the Disk Cell RTC Battery Dimensions Standalone Battery Power RequirementsAC Adapter Power Requirements Temperature Relative Humidity non condensing ShockVibration Inch XGA, TFT Display Logical configuration Hard Drives15 GB 10 GB User capacity per drive1 Interface type 15 GB 10 GB Physical configuration Buffer size3Disk rotational speed Transfer rate Diskette Drive CD-ROM Drive DVD-ROM Drive Disk thickness Track pitchAudio output level Weight Power supply input AC Adapter Battery Packs EnergyEnvironmental requirements System DMA Hardware DMA System Function System Interrupts Hardware IRQ System Function System I/O Addresses 16F Unused VGA System Memory Map Size Memory Address System Function Pin Signal Audio out Ground Pin Signal Audio GroundTable A-1 Stereo Speaker/Headphone Table A-2 Microphone Pin Signal Table A-3 External Keyboard/MouseTable A-4 RJ-11 Modem Table A-5 RJ-45 Network Interface Table A-6 Universal Serial Bus Table A-7 Serial Table A-8 External Monitor Table A-9 Parallel Conductor Power Cord Set General Requirements Conductor Power Cord Set Requirements-By Country Country-Specific RequirementsCountry Accredited Agency Applicable Note Number Maintenance and Service Guide Screw Listing Table C-1 M2.5 × 7.0 Screw HeadColor Qty Length Thread Width Pewter M2.5 Table C-1 M2.5 × 7.0 Screw Table C-1 M2.5 × 7.0 Screw Head Color Qty Length Thread Width Table C-2 M2.5 × 8.0 Screw Color Qty Length Thread Width Silver M2.5 Table C-3 M2 × 5.5 Screw Color Qty Length Thread Width Silver Color Qty Length Thread Width Black M2.5 Where used Table C-4 M2.5 × 4.5 Screw Table C-4 M2.5 × 4.5 Screw Table C-4 M2.5 × 4.5 Screw Table C-4 M2.5 × 4.5 Screw Table C-5 M2 × Table C-6 M2.5 × 4.0 Screw Head Table C-7 M2.5 × 3.0 Screw Table C-8 M2 × 6.0 Screw Color Qty Length Thread Width Silver Where used Table C-9 M1 × 4.0 Screw Table C-10 M2 × 4.0 Screw Table C-10 M2 × 4.0 Screw Table C-11 M2 × 14.5 Screw Table C-12 M2 × 5.0 Screw Table C-13 Mm Screwlock Head Color Qty Length Socket Width Index Index-2 Index-3 Spare part number Index-5 Troubleshooting