Power switch/LED assembly | HP E1Z74UT E1Z74UT#ABA specs

Power switch/LED assembly

Description	Spare part number

Power switch/LED assembly	732749-001

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

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

3.Remove the front bezel (Front bezel on page 40).

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

68	Chapter 5 Removal and replacement procedures: Tower (TWR)

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

Contents

Maintenance and Service Guide Product notice About This Book Iii 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 Appendix C Power cord set requirements 226 TWR specifications 228 SFF specifications 229 Standard configuration features Product featuresStandard configuration features Tower TWR Product features Small Form Factor SFF Tower TWR front panel components Small Form Factor SFF front panel components Tower TWR rear panel components Small Form Factor SFF rear panel components Serial number location Tower TWR Small Form Factor SFF Activating and Customizing the Software Activating and customizing the software in WindowsActivating the Windows operating system Run Windows Update monthly thereafter Downloading Windows 7 updatesInstalling or upgrading device drivers Customizing the monitor display Downloading Windows 8 updates Click Settings Change PC Settings Computer major components Illustrated parts catalogTower TWR chassis spare parts Tower TWR chassis spare parts Illustrated parts catalog Access panelPower supply Description Spare part number Front bezel Cables Misc parts Drives Description Spare part number Misc boardsSequential part number listing Spare part Description 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% Recommended materials and equipment Personal grounding methods and equipmentGrounding the work area Static Shielding Protection Levels Operating guidelines Cleaning the keyboard General cleaning safety precautionsCleaning the Computer Case Routine care Cleaning the mouse Service considerationsCleaning the monitor Power supply fan Screws Cables and connectorsTools and software Requirements Hard Drives Lithium coin cell battery Serial ATA Hard Drive CharacteristicsSata hard drives Cable management Sata hard drive cablesSmart ATA drives Sata data cable Removal and replacement procedures Tower TWR Preparation for disassembly Access panel Front bezel security Front bezel Bezel blanks Page DDR3-SDRAM DIMMs MemoryDIMMs Populating Dimm sockets Installing DIMMs Page Expansion cards Page Page Page System Board Connector System Board Label Color Component System board connections Drives Description Spare part number Optical drivesHard drives Guide Screw Device Drive positions Installing a 5.25-inch drive Removing 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 Front I/O assembly Media 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 Power supply PWR Pwrcpu PwrcmdPage 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 Installing a 2.5-inch hard drive Removing 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 Utility Computer Setup F10 Utilities Using Computer Setup F10 Utilities Computer Setup-File Computer Setup F10 Utility Computer Setup-Storage Removable Media Boot Storage Options Sata Emulation Boot Order Shortcut to Temporarily Override Boot OrderDPS Self-Test Power-On Computer Setup-SecurityOption Description Setup Password Password USB Security Network BootDevice Security Slot Security Security System Security Virtualization Technology Directed I/O Secure Boot DriveLock Security Computer Setup-Power Option Description OS PowerManagement Hardware Power Thermal Computer Setup-Advanced Option Heading Power-On Options Bus Options Bios Power-OnOnboard Devices Device Options Recovering the Configuration Settings VGA ConfigurationAMT Configuration Troubleshooting without diagnostics Safety and comfort Before you call for technical support Helpful hints Refer to Helpful hints on page 149 in this guidePage Solving general problems Computer date and time display is incorrect Cause Solution 152 Troubleshooting without diagnostics Cannot remove computer cover or access panel Cause SolutionPoor performance Cause Solution All apps icon Go to Start All Programs AccessoriesRun Under Windows System, click Run 154 Troubleshooting without diagnostics Solving power problems Power supply shuts down intermittently Cause Solution Hard drive error occurs Cause Solution Solving hard drive problems156 Troubleshooting without diagnostics Tools tab. Under Error-checking click Check Now Advanced Power-On Options Disk transaction problem Cause SolutionDrive not found identified Cause Solution Nonsystem disk/NTLDR missing message Cause Solution Computer seems to be locked up Cause Solution 158 Troubleshooting without diagnosticsComputer will not boot from hard drive Cause Solution Security Device Security 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 162 Troubleshooting without diagnostics Dim characters Cause Solution Image is not centered Cause Solution Select ImageControl/ Horizontal Position or Vertical 164 Troubleshooting without diagnostics Out of Range displays on screen Cause Solution Certain typed symbols do not appear correct Cause Solution Character Map Sound cuts in and out Cause Solution Solving audio problems166 Troubleshooting without diagnostics Advanced Device Options Internal Speaker Solving audio problems Line-in jack is not functioning properly Cause Solution There is no sound or sound volume is too low Cause Solution Solving printer problems168 Troubleshooting without diagnostics Printer will not print Cause Solution Printer will not turn on Cause Solution Solving keyboard and mouse problemsSolving keyboard and mouse problems 169 Printer prints garbled information Cause Solution 170 Troubleshooting without diagnostics Solving Hardware Installation Problems Solving Hardware Installation Problems 171 172 Troubleshooting without diagnostics Solving Hardware Installation Problems 173 Solving Network Problems 174 Troubleshooting without diagnostics Network status link light never flashes Cause Solution ManagerControl Panel, and then select Device Manager 176 Troubleshooting without diagnostics Diagnostics reports a failure Cause Solution Solving memory problems New network card will not boot Cause Solution Memory count during Post is wrong Cause Solution 178 Troubleshooting without diagnosticsOut of memory error Cause Solution Insufficient memory error during operation Cause Solution Solving processor problems Poor performance is experienced Cause SolutionCause Solution Solving CD-ROM and DVD problems 180 Troubleshooting without diagnosticsStorage Boot Order Movie will not play in the DVD drive Cause Solution Cannot eject compact disc tray-load unit Cause Solution USB flash drive not found identified Cause Solution Solving USB flash drive problems182 Troubleshooting without diagnostics System will not boot from USB flash drive Cause Solution Solving front panel component problems 183 Solving front panel component problemsSolving Internet access problems Unable to connect to the Internet Cause Solution 184 Troubleshooting without diagnostics Select Start Control Panel Click Internet OptionsSelect the Cookies check box and click the Delete button Solving software problems ROM issue Post error has occurred 186 Troubleshooting without diagnostics System files may be damaged Post error messages Post numeric codes and text messages Post error messagesROM Download to Disable to Control panel message Description Recommended action Post numeric codes and text messages Verify monitor is attached and turned CPU or Chassis Fan not Detected Will fix an erroneous error message Drivelock Security. For each listed If the error persists, replace the system board Post error messages Fails into the General grouping. Status White Power LED On None Computer on Activity Beeps Possible cause Recommended action Is not spinning, make sure the fans cable is For systems with a graphics card Install a TXT capable processor Password security and resetting Cmos 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 Restoring and recovering using Windows 8 tools Using Windows 8 Refresh Using Windows 8 Reset Select Reset Follow the on-screen instructions to continue Follow the on-screen instructions System backup and recoveryPage Creating recovery media Start Help and Support Click All Programs Next To create the Windows DVD System Restore Follow the on-screen instructions to set up your backup System Recovery System Recovery when Windows is responding System Recovery when Windows is not responding If Security and Protection is listed, continue with stepPage Select Install now Battery replacement Type Page Unlocking the smart cover lock Smart cover FailSafe keyPage 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 Access panel Locked Locking and unlocking 223 Index Keyboard Cleaning Spare part numbers Keyboard problems 169 SFF TWR Password 119 SFF power supply 112 Sata Windows Backing up information 215 Backup and recovery