Hood sensor, Description Spare part number | HP E1Z74UT E1Z74UT#ABA

Hood sensor

Description	Spare part number

Hood sensor	638816-001

1.Prepare the computer for disassembly (Preparation for disassembly on page 37).

2.Remove the access panel (Access panel on page 38).

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

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Image 87

HP E1Z74UT E1Z74UT#ABA, E1Z77UT E1Z77UT#ABA, E1Z75UT E1Z75UT#ABA manual Hood sensor, Description Spare part number

Contents

Maintenance and Service Guide Product notice Iii About This Book Iv 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 226 Tower TWR Product featuresStandard configuration features Standard configuration features Small Form Factor SFF Product features Tower 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 location Activating and Customizing the Software Activating and customizing the software in WindowsActivating the Windows operating system Customizing the monitor display Downloading Windows 7 updatesInstalling or upgrading device drivers Run Windows Update monthly thereafter Click Settings Change PC Settings Downloading Windows 8 updates Tower TWR chassis spare parts Illustrated parts catalogTower TWR chassis spare parts Computer major components Description Spare part number Front bezel Access panelPower supply Illustrated parts catalog Cables Misc parts Drives Spare part Description Number Misc boardsSequential part number listing Description Spare part number Tower 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% Static Shielding Protection Levels Personal grounding methods and equipmentGrounding the work area Recommended materials and equipment Operating guidelines Routine care General cleaning safety precautionsCleaning the Computer Case Cleaning the keyboard Power supply fan Service considerationsCleaning the monitor Cleaning the mouse Hard Drives Cables and connectorsTools and software Requirements Screws Lithium coin cell battery Serial ATA Hard Drive CharacteristicsSata hard drives Sata data cable Sata hard drive cablesSmart ATA drives Cable management Preparation for disassembly Removal and replacement procedures Tower TWR Access panel Front bezel security Front bezel Bezel blanks Page Populating Dimm sockets MemoryDIMMs DDR3-SDRAM DIMMs Installing DIMMs Page Expansion cards Page Page Page System board connections System Board Connector System Board Label Color Component Drives 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 assembly Power 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 Utility Using Computer Setup F10 Utilities Computer Setup F10 Utility Computer Setup-File Computer Setup-Storage Storage Options Sata Emulation Removable Media Boot Boot Order Shortcut to Temporarily Override Boot OrderDPS Self-Test Password Computer Setup-SecurityOption Description Setup Password Power-On Slot Security Network BootDevice Security USB Security Security Virtualization Technology Directed I/O System Security DriveLock Security Secure Boot Computer Setup-Power Option Description OS PowerManagement Thermal Hardware Power Option Heading Power-On Options Computer Setup-Advanced Device Options Bios Power-OnOnboard Devices Bus Options Recovering the Configuration Settings VGA ConfigurationAMT Configuration Safety and comfort Before you call for technical support Troubleshooting without diagnostics Refer to Helpful hints on page 149 in this guide Helpful hintsPage Computer date and time display is incorrect Cause Solution Solving general problems 152 Troubleshooting without diagnostics Cannot remove computer cover or access panel Cause SolutionPoor performance Cause Solution Under Windows System, click Run Go to Start All Programs AccessoriesRun All apps icon 154 Troubleshooting without diagnostics Power supply shuts down intermittently Cause Solution Solving power problems Tools tab. Under Error-checking click Check Now Solving hard drive problems156 Troubleshooting without diagnostics Hard drive error occurs Cause Solution Nonsystem disk/NTLDR missing message Cause Solution Disk transaction problem Cause SolutionDrive not found identified Cause Solution Advanced Power-On Options Security Device Security 158 Troubleshooting without diagnosticsComputer will not boot from hard drive Cause Solution Computer seems to be locked up Cause Solution Solving 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 diagnostics Select ImageControl/ Horizontal Position or Vertical Image is not centered Cause Solution Out of Range displays on screen Cause Solution 164 Troubleshooting without diagnostics Character Map Certain typed symbols do not appear correct Cause Solution Advanced Device Options Internal Speaker Solving audio problems166 Troubleshooting without diagnostics Sound cuts in and out Cause Solution Line-in jack is not functioning properly Cause Solution Solving audio problems Printer will not print Cause Solution Solving printer problems168 Troubleshooting without diagnostics There is no sound or sound volume is too low Cause Solution Printer prints garbled information Cause Solution Solving keyboard and mouse problemsSolving keyboard and mouse problems 169 Printer will not turn on Cause Solution 170 Troubleshooting without diagnostics Solving Hardware Installation Problems 171 Solving Hardware Installation Problems 172 Troubleshooting without diagnostics Solving Hardware Installation Problems 173 174 Troubleshooting without diagnostics Solving Network Problems Network status link light never flashes Cause Solution ManagerControl Panel, and then select Device Manager Diagnostics reports a failure Cause Solution 176 Troubleshooting without diagnostics New network card will not boot Cause Solution Solving memory problems Insufficient memory error during operation Cause Solution 178 Troubleshooting without diagnosticsOut of memory error Cause Solution Memory count during Post is wrong Cause Solution Solving 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 Solution System will not boot from USB flash drive Cause Solution Solving USB flash drive problems182 Troubleshooting without diagnostics USB flash drive not found identified Cause Solution Unable to connect to the Internet Cause Solution Solving front panel component problemsSolving Internet access problems Solving front panel component problems 183 184 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 problems System files may be damaged 186 Troubleshooting without diagnostics Post error messages Control panel message Description Recommended action Post error messagesROM Download to Disable to Post numeric codes and text messages Post 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 message If 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 on Is not spinning, make sure the fans cable is For systems with a graphics card Install a TXT capable processor Cmos Password security and resetting Resetting 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 tools Using 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 media Click All Programs To create the Windows DVD Next Follow the on-screen instructions to set up your backup System Restore System Recovery when Windows is responding System Recovery If 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 223 SFF TWR Keyboard Cleaning Spare part numbers Keyboard problems 169 119 SFF power supply 112 Password Sata Windows Backing up information 215 Backup and recovery