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HP E1Z74UT E1Z74UT#ABA, E1Z77UT E1Z77UT#ABA, E1Z75UT E1Z75UT#ABA manual Hood sensor

Models: E1Z77UT E1Z77UT#ABA E1Z74UT E1Z74UT#ABA E1Z75UT E1Z75UT#ABA

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Hood sensor

Description	Spare part number

Hood sensor	638816-001

1.Prepare the computer for disassembly (Preparation for disassembly on page 85).

2.Remove the access panel (Access panel on page 86).

3.Disconnect the cable from the system board connector labeled HSENSE (1).

4.Using a tool, remove the sensor from the slot by pushing it into the computer to remove it (2).

To install the hood sensor, reverse the removal procedure.

Hood sensor 119

Image 129

HP E1Z74UT E1Z74UT#ABA, E1Z77UT E1Z77UT#ABA, E1Z75UT E1Z75UT#ABA manual Hood sensor

Contents

Maintenance and Service Guide Product notice Iii About This BookIv About This Book Table of contents Removal and replacement procedures Tower TWR Removal and replacement procedures Small Form Factor SFF Computer Setup F10 Utility 132 Password security and resetting Cmos 200 TWR specifications 228 SFF specifications 229 Appendix C Power cord set requirements 226Standard configuration features Product featuresStandard configuration features Tower TWRSmall Form Factor SFF Product featuresTower TWR front panel components Small Form Factor SFF front panel components Tower TWR rear panel components Small Form Factor SFF rear panel components Tower TWR Small Form Factor SFF Serial number locationActivating and Customizing the Software Activating and customizing the software in WindowsActivating the Windows operating system Installing or upgrading device drivers Downloading Windows 7 updatesRun Windows Update monthly thereafter Customizing the monitor displayClick Settings Change PC Settings Downloading Windows 8 updatesTower TWR chassis spare parts Illustrated parts catalogComputer major components Tower TWR chassis spare partsPower supply Access panelIllustrated parts catalog Description Spare part number Front bezelCables Misc parts Drives Sequential part number listing Misc boardsDescription Spare part number Spare part Description NumberTower TWR chassis spare parts Illustrated parts catalog Tower TWR chassis spare parts Small Form Factor SFF chassis spare parts Power switch assembly Sata drive power cableSmall Form Factor SFF chassis spare parts Fan duct Rubber footChassis stand Keyboard Misc boards Small Form Factor SFF chassis spare parts Illustrated parts catalog 732772-001 Solenoid lock 733687-001 HP WLAN/Bluetooth module Electrostatic discharge information Generating static Preventing electrostatic damage to equipmentRelative Humidity Event 55% 40% 10% Grounding the work area Personal grounding methods and equipmentRecommended materials and equipment Static Shielding Protection LevelsOperating guidelines Cleaning the Computer Case General cleaning safety precautionsCleaning the keyboard Routine careCleaning the monitor Service considerationsCleaning the mouse Power supply fanTools and software Requirements Cables and connectorsScrews Hard DrivesLithium coin cell battery Serial ATA Hard Drive CharacteristicsSata hard drives Smart ATA drives Sata hard drive cablesCable management Sata data cablePreparation for disassembly Removal and replacement procedures Tower TWRAccess panel Front bezel security Front bezel Bezel blanks Page DIMMs MemoryDDR3-SDRAM DIMMs Populating Dimm socketsInstalling DIMMs Page Expansion cards Page Page Page System board connections System Board Connector System Board Label Color ComponentDrives Description Spare part number Optical drivesHard drives Guide Screw Device Drive positions Removing a 5.25-inch drive Installing a 5.25-inch drivePage Removing a 3.5-inch device Page Installing a 3.5-inch device Removing a slim optical drive Installing a slim optical drive Removing a 3.5-inch or 2.5-inch hard drive Page Installing a 3.5-inch or 2.5-inch hard drive Page Page Page Media Front I/O assemblyPower switch/LED assembly Page Fan sink Page Processor Description Spare part number Intel Core i7 processorIntel Core i5 processors Speaker Smart Cover Lock solenoid lock Hlock Page Hood sensor Fan Page PWR Pwrcpu Pwrcmd Power supplyPage Page System board Page Removal and replacement procedures Small Form Factor SFF Access panel 732760-001 Front bezel 732757-001 Optical drive bezel blank 732769-001 Front bezel security Page Bezel blanks Memory Installing DIMMs Page Expansion card Page Page Page Blue Front USB 3.0 Ports Drives Page Drive positions Removing a 3.5-inch device Installing a 3.5-inch device Page Removing a slim optical drive Installing a slim optical drive Removing and replacing a 3.5-inch hard drive Page Page Removing a 2.5-inch hard drive Installing a 2.5-inch hard drivePage Pwrcpu Pwrcmd PWR Page Page Fan duct Solenoid lock 732772-001 Hlock 118 Removal and replacement procedures Small Form Factor SFF Hood sensor Cable routing Front I/O assembly 732755-001 Page Power switch assembly Page Speaker 727149-001 Fan sink 727150-001 Processor Page System board Changing from desktop to tower configuration Page Computer Setup F10 Utilities Computer Setup F10 UtilityUsing Computer Setup F10 Utilities Computer Setup F10 Utility Computer Setup-FileComputer Setup-Storage Storage Options Sata Emulation Removable Media BootBoot Order Shortcut to Temporarily Override Boot OrderDPS Self-Test Option Description Setup Password Computer Setup-SecurityPower-On PasswordDevice Security Network BootUSB Security Slot SecuritySecurity Virtualization Technology Directed I/O System SecurityDriveLock Security Secure BootComputer Setup-Power Option Description OS PowerManagement Thermal Hardware PowerOption Heading Power-On Options Computer Setup-AdvancedOnboard Devices Bios Power-OnBus Options Device OptionsRecovering the Configuration Settings VGA ConfigurationAMT Configuration Safety and comfort Before you call for technical support Troubleshooting without diagnosticsRefer to Helpful hints on page 149 in this guide Helpful hintsPage Computer date and time display is incorrect Cause Solution Solving general problems152 Troubleshooting without diagnostics Cannot remove computer cover or access panel Cause SolutionPoor performance Cause Solution Run Go to Start All Programs AccessoriesAll apps icon Under Windows System, click Run154 Troubleshooting without diagnostics Power supply shuts down intermittently Cause Solution Solving power problems156 Troubleshooting without diagnostics Solving hard drive problemsHard drive error occurs Cause Solution Tools tab. Under Error-checking click Check NowDrive not found identified Cause Solution Disk transaction problem Cause SolutionAdvanced Power-On Options Nonsystem disk/NTLDR missing message Cause SolutionComputer will not boot from hard drive Cause Solution 158 Troubleshooting without diagnosticsComputer seems to be locked up Cause Solution Security Device SecuritySolving media card reader problems Solving media card reader problems 159Can not write to the media card Cause Solution Solving display problems 160 Troubleshooting without diagnosticsBlank screen no video Cause Solution Solving display problems Dim characters Cause Solution 162 Troubleshooting without diagnosticsSelect ImageControl/ Horizontal Position or Vertical Image is not centered Cause SolutionOut of Range displays on screen Cause Solution 164 Troubleshooting without diagnosticsCharacter Map Certain typed symbols do not appear correct Cause Solution166 Troubleshooting without diagnostics Solving audio problemsSound cuts in and out Cause Solution Advanced Device Options Internal SpeakerLine-in jack is not functioning properly Cause Solution Solving audio problems168 Troubleshooting without diagnostics Solving printer problemsThere is no sound or sound volume is too low Cause Solution Printer will not print Cause SolutionSolving keyboard and mouse problems 169 Solving keyboard and mouse problemsPrinter will not turn on Cause Solution Printer prints garbled information Cause Solution170 Troubleshooting without diagnostics Solving Hardware Installation Problems 171 Solving Hardware Installation Problems172 Troubleshooting without diagnostics Solving Hardware Installation Problems 173 174 Troubleshooting without diagnostics Solving Network ProblemsNetwork status link light never flashes Cause Solution ManagerControl Panel, and then select Device Manager Diagnostics reports a failure Cause Solution 176 Troubleshooting without diagnosticsNew network card will not boot Cause Solution Solving memory problemsOut of memory error Cause Solution 178 Troubleshooting without diagnosticsMemory count during Post is wrong Cause Solution Insufficient memory error during operation Cause SolutionSolving processor problems Poor performance is experienced Cause SolutionCause Solution Solving CD-ROM and DVD problems 180 Troubleshooting without diagnosticsStorage Boot Order Cannot eject compact disc tray-load unit Cause Solution Movie will not play in the DVD drive Cause Solution182 Troubleshooting without diagnostics Solving USB flash drive problemsUSB flash drive not found identified Cause Solution System will not boot from USB flash drive Cause SolutionSolving Internet access problems Solving front panel component problemsSolving front panel component problems 183 Unable to connect to the Internet Cause Solution184 Troubleshooting without diagnostics Select Start Control Panel Click Internet OptionsSelect the Cookies check box and click the Delete button ROM issue Post error has occurred Solving software problemsSystem files may be damaged 186 Troubleshooting without diagnosticsPost error messages ROM Download to Disable to Post error messagesPost numeric codes and text messages Control panel message Description Recommended actionPost numeric codes and text messages Verify monitor is attached and turned CPU or Chassis Fan not Detected Drivelock Security. For each listed Will fix an erroneous error messageIf the error persists, replace the system board Post error messages Fails into the General grouping. Status Activity Beeps Possible cause Recommended action White Power LED On None Computer onIs not spinning, make sure the fans cable is For systems with a graphics card Install a TXT capable processor Cmos Password security and resettingResetting the password jumper Clearing and resetting the Cmos Page HP PC Hardware Diagnostics Why run HP PC Hardware Diagnostics UefiHow to access and run HP PC Hardware Diagnostics Uefi Downloading HP PC Hardware Diagnostics to a USB device System backup and recovery Backing up, restoring, and recovering in WindowsSystem backup and recovery Creating recovery media and backups Using Windows 8 Refresh Restoring and recovering using Windows 8 toolsUsing Windows 8 Reset Follow the on-screen instructions System backup and recovery Select Reset Follow the on-screen instructions to continuePage Start Help and Support Creating recovery mediaClick All Programs To create the Windows DVD NextFollow the on-screen instructions to set up your backup System RestoreSystem Recovery when Windows is responding System RecoveryIf Security and Protection is listed, continue with step System Recovery when Windows is not respondingPage Select Install now Battery replacement Type Page Smart cover FailSafe key Unlocking the smart cover lockPage Page Power cord set requirements Japanese power cord requirementsGeneral requirements Country-specific requirements Country-specific requirements 227Country Accrediting Agency Specifications TWR specificationsAppendix D Specifications SFF specifications Rated Input Current Index Access panel Locked Locking and unlocking 223SFF TWR Keyboard Cleaning Spare part numbers Keyboard problems 169119 SFF power supply 112 PasswordSata Windows Backing up information 215 Backup and recovery