HP 1105 manual Routine Care, and Disassembly Preparation, Electrostatic Discharge Information

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5Routine Care, and Disassembly Preparation

This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Electrostatic Discharge Information

A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, but it has been degraded in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

Generating Static

The following table shows that:

Different activities generate different amounts of static electricity.

Static electricity increases as humidity decreases.

 

 

Relative Humidity

 

 

 

 

 

Event

55%

40%

10%

 

 

 

 

Walking across carpet

7,500 V

15,000 V

35,000 V

Walking across vinyl floor

3,000 V

5,000 V

12,000 V

Motions of bench worker

400 V

800 V

6,000 V

Removing DIPs* from plastic tube

400 V

700 V

2,000 V

 

 

 

 

Electrostatic Discharge Information 23

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Contents Maintenance & Service Guide Maintenance & Service Guide About This Book IiiTable of contents Illustrated parts catalog 105 101103 107All-in One Model 139 ViiiProduct Features OverviewProduct Features Front ComponentsComponent Side Components Rear Components Installing and Customizing the Software Activating and customizing the softwareActivating the Windows Operating System Downloading Windows 8 updates Run Windows Update monthly thereafterCustomizing the monitor display Computer Setup F10 Utility Computer Setup F10 UtilitiesUsing Computer Setup F10 Utilities Computer Setup F10 Utility1Computer Setup F10 Utility Computer Setup-File 2Computer Setup-FileSata Defaults Computer Setup-Storage3Computer Setup-Storage OptionDescriptionSata Emulation Removable Media BootStorage Options ESATA Port Max eSATA SpeedBoot Order Shortcut to Temporarily Override Boot OrderDPS Self-Test Computer Setup-Security 4Computer Setup-SecuritySlot Security Network BootMaster Boot Record System IDsSystem Security Secure Boot ConfigurationDriveLock Security Computer Setup-Power 5Computer Setup-PowerComputer Setup-Advanced 6Computer Setup-Advanced for advanced usersOption Heading Power-On Options Bus Options Bios Power-OnOnboard Devices Device OptionsRecovering the Configuration Settings VGA ConfigurationAMT Configuration Sata Hard Drives Serial ATA Sata Drive Guidelines and FeaturesSerial ATA Hard Drive Characteristics Sata Hard Drive CablesSerial ATA Sata Drive Guidelines and Features Smart ATA DrivesHard Drive Capacities Generating Static Routine Care, and Disassembly PreparationElectrostatic Discharge Information Relative Humidity Event 55% 40% 10%Personal Grounding Methods and Equipment Routine Care, and Disassembly PreparationPreventing Electrostatic Damage to Equipment Static Shielding Protection LevelsGrounding the Work Area Recommended Materials and EquipmentOperating Guidelines General Cleaning Safety PrecautionsCleaning the Computer Case Routine CareCleaning the Keyboard Cleaning the MonitorCables and Connectors Service ConsiderationsCleaning the Mouse Tools and Software RequirementsLithium Coin Cell Battery Hard DrivesIllustrated parts catalog Computer major componentsIllustrated parts catalog Computer major components Cables Boards Webcam moduleMisc Parts Description Spare part number Fan/blowerHP Business Digital Headset not illustrated Description Spare part number Optical drive Mass storage devices not illustratedSequential part number listing Hard drivesIllustrated parts catalog Removal and Replacement Procedures All-in One AIO Chassis Preparing to Disassemble the ComputerRear Cover Description Spare part number Rear cover 669985-001Stand Description Spare part number Stand 669988-001Page Foot assembly Description Spare part number Foot assembly 669986-001Page Memory Cover Page Memory Description Spare part numberPage Wlan Module Page RTC Battery Page Backlight Controller Panel manufacturer Jumper setting Speakers Page Optical Drive Page Optical Drive Cables and Connector Page Hard Drive Page Hard Drive Cables and Connector Page Fan Description Spare part number Fan 669981-001Page Side I/O Cover Description Spare part number Side I/O cover 710543-001Page Webcam Module Description Spare part number Webcam module 710544-001Page System Board Cover Page Display Cable Description Spare part number Display cable 669996-001Page System Board Security Bracket Front Bezel Description Spare part number Front bezel 710542-001Display Panel Display Panel Panel manufacturer Screw hole labelCMI panels Panel manufacturer Jumper setting Troubleshooting Without Diagnostics Safety and Comfort Before You Call for Technical SupportHelpful Hints Page Table A-1Solving General Problems Solving General ProblemsSolving General Problems Computer date and time display is incorrect Cause SolutionPoor performance Cause Solution There is no sound or sound volume is too low Cause SolutionCannot remove computer cover or access panel Cause Advanced Device OptionsAll apps icon Under Windows System, click RunCause Solution Table A-2Solving Power Problems Solving Power ProblemsSolving Power Problems Power supply shuts down intermittently Cause SolutionSome models, is set to the appropriate voltage. Proper Solving Hard Drive Problems Solving Hard Drive ProblemsTable A-3Solving Hard Drive Problems Storage Boot Order Nonsystem disk/NTLDR missing message Cause SolutionComputer will not boot from hard drive Cause Solution Device ConfigurationComputer seems to be locked up Cause Solution Solving Media Card Reader Problems Table A-4Solving Media Card Reader ProblemsCan not write to the media card Cause Solving Media Card Reader Problems Blank screen no video Cause Solution Solving Display ProblemsTable A-5Solving Display Problems Adjust screen resolutionSolving Display Problems Dim characters Cause SolutionImage is not centered Cause Solution No Connection, Check Signal Cable displays on screen CauseSelect ImageControl/ Horizontal Position or Vertical Out of Range displays on screen Cause Certain typed symbols do not appear correct Cause Solving Audio Problems Solving Audio ProblemsTable A-6Solving Audio Problems Sound from headphones is not clear or muffled Cause There is no sound or sound volume is too low CauseLine-in jack is not functioning properly Cause Table A-7Solving Printer Problems Solving Printer ProblemsSolving Printer Problems Printer will not print Cause SolutionPrinter prints garbled information Cause Solution Solving Keyboard and Mouse Problems Solving Keyboard and Mouse ProblemsTable A-8Solving Keyboard Problems Table A-9Solving Mouse Problems EnterTable A-10Solving Hardware Installation Problems Solving Hardware Installation ProblemsSolving Hardware Installation Problems Control Panel , and then select Device ManagerComputer will not start Cause Solution Solving Network Problems Solving Network ProblemsTable A-11Solving Network Problems Network status link light never flashes Cause Solution ManagerDiagnostics reports a failure Cause Solving Memory Problems Out of memory error Cause Solution Solving Memory ProblemsTable A-12Solving Memory Problems Memory count during Post is wrong Cause SolutionTable A-13Solving Processor Problems Solving Processor ProblemsSolving CD-ROM and DVD Problems Table A-14Solving CD-ROM and DVD ProblemsSolving CD-ROM and DVD Problems Security Network BootMovie will not play in the DVD drive Cause Solution Solving USB Flash Drive Problems Cannot eject compact disc tray-load unit CauseUSB flash drive not found identified Cause Solution Solving USB Flash Drive ProblemsTable A-15Solving USB Flash Drive Problems System will not boot from USB flash drive Cause SolutionPorts are set to Enabled in Security USB Security Solving Front Panel Component ProblemsSolving Internet Access Problems Unable to connect to the Internet Cause SolutionSolving Internet Access Problems Select Start Control PanelClick Internet Options Solving Software Problems Solving Software Problems Contacting Customer Support HP PC Hardware Diagnostics Why run HP PC Hardware Diagnostics UefiHow to access and run HP PC Hardware Diagnostics Downloading HP PC Hardware Diagnostics to a USB device Backup and recovery in Windows Backing up your informationPerforming a system recovery Using the Windows recovery toolsUsing f11 recovery tools Using Windows 8 operating system media purchased separatelyFollow the on-screen instructions Page Post Error Messages Post Numeric Codes and Text Messages Appendix D Post Error MessagesROM Download to Disable to Control panel message Description Recommended actionPost Numeric Codes and Text Messages Test under Storage DPS Self-test Bios Appendix D Post Error Messages Options SERR# Generation Disable Activity Beeps Possible Cause Recommended ActionReplace one device at a time Activity Beeps Possible Cause Recommended Action Board needs to be replaced Power Cord Set Requirements Japanese Power Cord RequirementsGeneral Requirements Appendix E Power Cord Set Requirements Country-Specific RequirementsCountry Accrediting Agency Specifications All-in One ModelAll-in One Model Cleaning 27 keyboard problems IndexSata
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