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HP E1Z74UT E1Z74UT#ABA, E1Z77UT E1Z77UT#ABA, E1Z75UT E1Z75UT#ABA Power supply, PWR Pwrcpu Pwrcmd

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

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Page 90

Power supply

NOTE: System board appearance may vary.

Description	Spare part number

Power supply, 320W, 92% efficient	702452-001

Power supply, 320W, 90% efficient	702453-001

Power supply, 320W	702454-001

Power supply, HV, 320W	707906-001

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 power cables from the following system board connectors:.

{PWR

{PWRCPU

{PWRCMD

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

Image 90

HP E1Z74UT E1Z74UT#ABA, E1Z77UT E1Z77UT#ABA, E1Z75UT E1Z75UT#ABA manual Power supply, PWR Pwrcpu Pwrcmd

Contents

Maintenance and Service Guide Product notice About This Book IiiIv 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 229Standard configuration features Product featuresStandard configuration features Tower TWRProduct features Small Form Factor SFFTower 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 SFFActivating 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 displayDownloading Windows 8 updates Click Settings Change PC SettingsComputer major components Illustrated parts catalogTower TWR chassis spare parts Tower TWR chassis spare partsIllustrated parts catalog Access panelPower supply Description Spare part number Front bezelCables Misc parts Drives Description Spare part number Misc boardsSequential part number listing 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% Recommended materials and equipment Personal grounding methods and equipmentGrounding the work area Static Shielding Protection LevelsOperating guidelines Cleaning the keyboard General cleaning safety precautionsCleaning the Computer Case Routine careCleaning the mouse Service considerationsCleaning the monitor Power supply fanScrews Cables and connectorsTools and software Requirements Hard DrivesLithium coin cell battery Serial ATA Hard Drive CharacteristicsSata hard drives Cable management Sata hard drive cablesSmart ATA drives Sata data cableRemoval and replacement procedures Tower TWR Preparation for disassemblyAccess panel Front bezel security Front bezel Bezel blanks Page DDR3-SDRAM DIMMs MemoryDIMMs Populating Dimm socketsInstalling DIMMs Page Expansion cards Page Page Page System Board Connector System Board Label Color Component System board connectionsDrives 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 MediaPower 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 UtilitiesUsing Computer Setup F10 Utilities Computer Setup-File Computer Setup F10 UtilityComputer Setup-Storage Removable Media Boot Storage Options Sata EmulationBoot Order Shortcut to Temporarily Override Boot OrderDPS Self-Test Power-On Computer Setup-SecurityOption Description Setup Password PasswordUSB Security Network BootDevice Security Slot SecuritySecurity System Security Virtualization Technology Directed I/OSecure Boot DriveLock SecurityComputer Setup-Power Option Description OS PowerManagement Hardware Power ThermalComputer Setup-Advanced Option Heading Power-On OptionsBus Options Bios Power-OnOnboard Devices Device OptionsRecovering the Configuration Settings VGA ConfigurationAMT Configuration Troubleshooting without diagnostics Safety and comfort Before you call for technical supportHelpful hints Refer to Helpful hints on page 149 in this guidePage Solving general problems Computer date and time display is incorrect Cause Solution152 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 Run154 Troubleshooting without diagnostics Solving power problems Power supply shuts down intermittently Cause SolutionHard drive error occurs Cause Solution Solving hard drive problems156 Troubleshooting without diagnostics Tools tab. Under Error-checking click Check NowAdvanced Power-On Options Disk transaction problem Cause SolutionDrive not found identified Cause Solution Nonsystem disk/NTLDR missing message Cause SolutionComputer seems to be locked up Cause Solution 158 Troubleshooting without diagnosticsComputer will not boot from hard drive 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 162 Troubleshooting without diagnostics Dim characters Cause SolutionImage is not centered Cause Solution Select ImageControl/ Horizontal Position or Vertical164 Troubleshooting without diagnostics Out of Range displays on screen Cause SolutionCertain typed symbols do not appear correct Cause Solution Character MapSound cuts in and out Cause Solution Solving audio problems166 Troubleshooting without diagnostics Advanced Device Options Internal SpeakerSolving audio problems Line-in jack is not functioning properly Cause SolutionThere is no sound or sound volume is too low Cause Solution Solving printer problems168 Troubleshooting without diagnostics Printer will not print Cause SolutionPrinter will not turn on Cause Solution Solving keyboard and mouse problemsSolving keyboard and mouse problems 169 Printer prints garbled information Cause Solution170 Troubleshooting without diagnostics Solving Hardware Installation Problems Solving Hardware Installation Problems 171172 Troubleshooting without diagnostics Solving Hardware Installation Problems 173 Solving Network Problems 174 Troubleshooting without diagnosticsNetwork status link light never flashes Cause Solution ManagerControl Panel, and then select Device Manager 176 Troubleshooting without diagnostics Diagnostics reports a failure Cause SolutionSolving memory problems New network card will not boot Cause SolutionMemory count during Post is wrong Cause Solution 178 Troubleshooting without diagnosticsOut of memory error 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 Movie will not play in the DVD drive Cause Solution Cannot eject compact disc tray-load unit Cause SolutionUSB flash drive not found identified Cause Solution Solving USB flash drive problems182 Troubleshooting without diagnostics System will not boot from USB flash drive Cause SolutionSolving front panel component problems 183 Solving front panel component problemsSolving Internet access problems 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 Solving software problems ROM issue Post error has occurred186 Troubleshooting without diagnostics System files may be damagedPost error messages Post numeric codes and text messages Post error messagesROM Download to Disable to Control panel message Description Recommended actionPost 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 listedIf 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 actionIs not spinning, make sure the fans cable is For systems with a graphics card Install a TXT capable processor Password security and resetting CmosResetting 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 RefreshUsing 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 SupportClick All Programs Next To create the Windows DVDSystem Restore Follow the on-screen instructions to set up your backupSystem Recovery System Recovery when Windows is respondingSystem 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 IndexKeyboard Cleaning Spare part numbers Keyboard problems 169 SFF TWRPassword 119 SFF power supply 112Sata Windows Backing up information 215 Backup and recovery