Power switch assembly | HP E1Z77UT E1Z77UT#ABA, E1Z74UT E1Z74UT#ABA

Power switch assembly

Description	Spare part number

Power switch assembly	732756-001

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

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

3.Remove the front bezel (Front bezel on page 87).

4.Rotate the drive cage to its upright position.

5.Disconnect the cable from the system board connector labeled PB/LED.

Power switch assembly 123

Image 133

HP E1Z77UT E1Z77UT#ABA, E1Z74UT E1Z74UT#ABA, E1Z75UT E1Z75UT#ABA manual Power switch assembly

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 Standard configuration features Product featuresStandard configuration features Tower TWR 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 in Windows Activating and Customizing the SoftwareActivating the Windows operating system Installing or upgrading device drivers Downloading Windows 7 updatesRun Windows Update monthly thereafter Customizing the monitor display Click Settings Change PC Settings Downloading Windows 8 updates Tower TWR chassis spare parts Illustrated parts catalogComputer major components Tower TWR chassis spare parts Power supply Access panelIllustrated parts catalog Description Spare part number Front bezel Cables Misc parts Drives Sequential part number listing Misc boardsDescription Spare part number Spare part Description Number Tower TWR chassis spare parts Illustrated parts catalog Tower TWR chassis spare parts Small Form Factor SFF chassis spare parts Sata drive power cable Power switch assemblySmall Form Factor SFF chassis spare parts Rubber foot Fan ductChassis 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 Preventing electrostatic damage to equipment Generating staticRelative Humidity Event 55% 40% 10% Grounding the work area Personal grounding methods and equipmentRecommended materials and equipment Static Shielding Protection Levels Operating guidelines Cleaning the Computer Case General cleaning safety precautionsCleaning the keyboard Routine care Cleaning the monitor Service considerationsCleaning the mouse Power supply fan Tools and software Requirements Cables and connectorsScrews Hard Drives Serial ATA Hard Drive Characteristics Lithium coin cell batterySata hard drives Smart ATA drives Sata hard drive cablesCable management Sata data cable Preparation for disassembly Removal and replacement procedures Tower TWR Access panel Front bezel security Front bezel Bezel blanks Page DIMMs MemoryDDR3-SDRAM DIMMs Populating Dimm sockets Installing DIMMs Page Expansion cards Page Page Page System board connections System Board Connector System Board Label Color Component Description Spare part number Optical drives 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 Description Spare part number Intel Core i7 processor 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 Shortcut to Temporarily Override Boot Order Boot OrderDPS Self-Test Option Description Setup Password Computer Setup-SecurityPower-On Password Device Security Network BootUSB Security Slot Security Security Virtualization Technology Directed I/O System Security DriveLock Security Secure Boot Option Description OS Power Computer Setup-PowerManagement Thermal Hardware Power Option Heading Power-On Options Computer Setup-Advanced Onboard Devices Bios Power-OnBus Options Device Options VGA Configuration Recovering the Configuration SettingsAMT 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 Cannot remove computer cover or access panel Cause Solution 152 Troubleshooting without diagnosticsPoor performance Cause Solution Run Go to Start All Programs AccessoriesAll apps icon Under Windows System, click Run 154 Troubleshooting without diagnostics Power supply shuts down intermittently Cause Solution Solving power problems 156 Troubleshooting without diagnostics Solving hard drive problemsHard drive error occurs Cause Solution Tools tab. Under Error-checking click Check Now Drive not found identified Cause Solution Disk transaction problem Cause SolutionAdvanced Power-On Options Nonsystem disk/NTLDR missing message Cause Solution Computer will not boot from hard drive Cause Solution 158 Troubleshooting without diagnosticsComputer seems to be locked up Cause Solution Security Device Security Solving media card reader problems 159 Solving media card reader problemsCan not write to the media card Cause Solution 160 Troubleshooting without diagnostics Solving display problemsBlank 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 166 Troubleshooting without diagnostics Solving audio problemsSound cuts in and out Cause Solution Advanced Device Options Internal Speaker Line-in jack is not functioning properly Cause Solution Solving audio problems 168 Troubleshooting without diagnostics Solving printer problemsThere is no sound or sound volume is too low Cause Solution Printer will not print Cause Solution Solving keyboard and mouse problems 169 Solving keyboard and mouse problemsPrinter will not turn on Cause Solution Printer prints garbled information 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 Manager Network status link light never flashes Cause SolutionControl 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 Out of memory error Cause Solution 178 Troubleshooting without diagnosticsMemory count during Post is wrong Cause Solution Insufficient memory error during operation Cause Solution Poor performance is experienced Cause Solution Solving processor problemsCause Solution 180 Troubleshooting without diagnostics Solving CD-ROM and DVD problemsStorage Boot Order Cannot eject compact disc tray-load unit Cause Solution Movie will not play in the DVD drive Cause Solution 182 Troubleshooting without diagnostics Solving USB flash drive problemsUSB flash drive not found identified Cause Solution System will not boot from USB flash drive Cause Solution Solving Internet access problems Solving front panel component problemsSolving front panel component problems 183 Unable to connect to the Internet Cause Solution Select Start Control Panel Click Internet Options 184 Troubleshooting without diagnosticsSelect 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 ROM Download to Disable to Post error messagesPost numeric codes and text messages Control panel message Description Recommended action 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 Why run HP PC Hardware Diagnostics Uefi HP PC Hardware DiagnosticsHow to access and run HP PC Hardware Diagnostics Uefi Downloading HP PC Hardware Diagnostics to a USB device Backing up, restoring, and recovering in Windows System backup and recoverySystem 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 Japanese power cord requirements Power cord set requirementsGeneral requirements Country-specific requirements 227 Country-specific requirementsCountry Accrediting Agency TWR specifications 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