HP E1Z74UT User Manual Page 212
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8. Plug in the computer and turn on power. Allow the operating system to start. This clears the current
passwords and disables the password features.
9. To establish new passwords, repeat steps 1 through 4, replace the password jumper on pins 1
and 2, then repeat steps 6 through 8. Establish the new passwords in Computer Setup.
Clearing and resetting the CMOS
The computer’s configuration memory (CMOS) stores information about the computer’s configuration.
The CMOS button resets CMOS but does not clear the power-on and setup passwords.
Clearing CMOS will clear the Active Management Technology (AMT) settings in the Management
Engine BIOS Extension (MEBx), including the password. The password will default to “admin” and will
need to be reset. The AMT settings will also need to be reset. To access the MEBx, press
Ctrl+P during
POST.
1. Turn off the computer and any external devices, and disconnect the power cord from the power
outlet.
2. Disconnect the keyboard, monitor, and any other external equipment connected to the computer.
WARNING! To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
sure to disconnect the power cord from the wall outlet, and allow the internal system components
to cool before touching.
CAUTION: When the computer is plugged in, the power supply always has voltage applied to
the system board even when the unit is turned off. Failure to disconnect the power cord can result
in damage to the system.
Static electricity can damage the electronic components of the computer or optional equipment.
Before beginning these procedures, ensure that you are discharged of static electricity by briefly
touching a grounded metal object. See the Safety & Regulatory Information guide for more
information.
3. Remove the computer cover or access panel.
CAUTION: Pushing the CMOS button will reset CMOS values to factory defaults. It is important
to back up the computer CMOS settings before resetting them in case they are needed later. Back
up is easily done through Computer Setup. See
Computer Setup (F10) Utility on page 132 for
information on backing up the CMOS settings.
202 Chapter 10 Password security and resetting CMOS
- Maintenance and Service Guide 1
- About This Book 3
- Table of contents 5
- 1 Product features 11
- Small Form Factor (SFF) 12
- Serial number location 17
- Software 18
- Windows 8 19
- Downloading Windows 8 updates 20
- 3 Illustrated parts catalog 21
- Misc parts 24
- Misc boards 26
- Computer major components 30
- Spare part 37
- Description 37
- 732772-001 Solenoid lock 37
- 4 Routine care, SATA drive 38
- Generating static 39
- Grounding the work area 40
- Operating guidelines 41
- Routine care 42
- Service considerations 43
- Cables and connectors 44
- Hard Drives 44
- SATA hard drives 45
- SATA hard drive cables 46
- SMART ATA drives 46
- Cable management 46
- 5 Removal and replacement 47
- Access panel 48
- Front bezel security 49
- Front bezel 50
- Expansion cards 56
- No. Guide Screw Device 62
- Removing a 5.25-inch drive 64
- Installing a 5.25-inch drive 64
- Power switch/LED assembly 78
- Speaker 645330-001 83
- Solenoid lock 641498-001 84
- Fan 636922-001 88
- 6 Removal and replacement 95
- Bezel blanks 100
- DDR3-SDRAM DIMMs 101
- Populating DIMM sockets 101
- Installing DIMMs 102
- Expansion card 104
- System board connections 108
- Drive positions 111
- Removing a 3.5-inch device 112
- Installing a 3.5-inch device 113
- Removing a slim optical drive 115
- Power supply 122
- Fan duct 125
- Description Spare part number 126
- Solenoid lock 732772-001 126
- Hood sensor 129
- Cable routing 130
- Front I/O assembly 131
- Power switch assembly 133
- Speaker 727149-001 135
- Fan sink 136
- Processor 137
- System board 139
- Computer Setup—File 144
- Computer Setup—Storage 145
- Computer Setup—Security 148
- Computer Setup—Power 153
- Computer Setup—Advanced 155
- 8 Troubleshooting without 158
- Helpful hints 159
- Solving general problems 161
- Solving power problems 165
- Solving hard drive problems 166
- Solving display problems 170
- Solving audio problems 176
- Solving printer problems 178
- Solving Network Problems 184
- Solving memory problems 187
- Solving processor problems 189
- Solving software problems 195
- 9 POST error messages 197
- Resetting the password jumper 211
- 11 HP PC Hardware Diagnostics 214
- 12 System backup and recovery 216
- Using Windows 8 Refresh 218
- Using Windows 8 Reset 219
- Creating recovery media 222
- System Restore 225
- System Recovery 226
- A Battery replacement 230
- Smart cover FailSafe key 233
- C Power cord set requirements 236
- Country-specific requirements 237
- D Specifications 238
- SFF specifications 239
- Rated Input Current 4A 240
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