HP E1Z74UT User Manual Page 209
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Activity Beeps Possible cause Recommended action
Red Power LED flashes eleven
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue until
problem is solved.
11 The current processor does
not support a feature
previously enabled on this
system.
1. Install a TXT capable processor.
2. Disable TXT in the Computer Setup (F10)
utility.
3. Reinstall the original processor.
System does not power on and
LEDs are not flashing.
None System unable to power
on.
Press and hold the power button for less than 4
seconds. If the hard drive LED turns white, the
power button is working correctly. Try the
following:
1. Check that the voltage selector (some
models), located on the rear of the power
supply, is set to the appropriate voltage.
Proper voltage setting depends on your
region.
2. Replace the system board.
OR
Press and hold the power button for less than 4
seconds. If the hard drive LED does not turn on
white then:
1. Check that the unit is plugged into a
working AC outlet.
2. Open hood and check that the power button
harness is properly connected to the system
board.
3. Check that both power supply cables are
properly connected to the system board.
4. Check to see if the 5V_aux light on the
system board is turned on. If it is turned on,
then replace the power button harness. If the
problem persists, replace the system board.
5. If the 5V_aux light on the system board is
not turned on, remove the expansion cards
one at a time until the 5V_aux light on the
system board turns on. It the problem
persists, replace the power supply.
Interpreting POST diagnostic front panel LEDs and audible codes
199
- 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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