HP 400 G1 Spécifications Page 127
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Power supply
Description Spare part number
Power supply, 240W, 85% efficient 722536-001
Power supply, 240W, standard 702457-001
WARNING! To reduce potential safety issues, only the power supply provided with the computer, a
replacement power supply provided by HP, or a power supply purchased as an accessory from HP
should be used with the computer.
The power supply is located at the rear of the chassis. It is held in place by three Torx screws outside of
the chassis and a release lever inside of the chassis.
WARNING! Voltage is always present on the system board when the computer is plugged into an
active AC outlet. To avoid possible personal injury and damage to the equipment the power cord
should be disconnected from the computer and/or the AC outlet before opening the computer.
1. Prepare the computer for disassembly (Preparation for disassembly on page 90).
2. Remove the access panel (
Access panel on page 91).
3. Rotate the drive cage to the upright position.
4. Disconnect all power cables from the following system board connectors:
●
PWRCPU
●
PWRCMD
●
PWR
5. Release the power supply cables from the cable retaining clip under the drive cage.
Power supply
117
- Maintenance and Service Guide 1
- About This Book 3
- Table of contents 5
- 1 Product features 11
- Small Form Factor 12
- Front panel components 13
- Rear panel components 15
- Microtower (model 490) 16
- Small form factor 17
- Serial number location 18
- Software 19
- Windows 8 20
- Downloading Windows 8 updates 21
- 3 Illustrated parts catalog 22
- Misc parts 26
- Misc boards 28
- Computer major components 33
- 4 Routine care, SATA drive 42
- Generating static 43
- Grounding the work area 44
- Operating guidelines 45
- Routine care 46
- Service considerations 47
- Cables and connectors 48
- Hard Drives 48
- SATA hard drives 49
- SATA hard drive cables 50
- SMART ATA drives 50
- Cable management 50
- 5 Removal and replacement 51
- Expansion cards 60
- No. Mounting Screw Device 69
- 3.5-inch Hard Drive 69
- Removing a 5.25-inch drive 71
- Installing a 5.25-inch drive 71
- Installing a 3.5-inch drive 79
- Power switch/LED assembly 86
- Speaker 745053-001 92
- Fan 745052-001 94
- Fan, BFR/PVC free 748825-001 94
- 6 Removal and replacement 100
- Access panel 101
- Front bezel 102
- Front bezel security 103
- Bezel blanks 104
- DDR3-SDRAM DIMMs 105
- Populating DIMM sockets 106
- Installing DIMMs 106
- Expansion card 108
- System board connections 112
- Drive positions 115
- Removing a 3.5-inch device 116
- Installing a 3.5-inch device 117
- Removing a slim optical drive 120
- Power supply 127
- Fan duct 129
- Front I/O assembly 130
- Power switch assembly 133
- Description Spare part number 136
- Speaker 727149-001 136
- Fan sink 138
- Processor 140
- System board 142
- Computer Setup—File 147
- Computer Setup—Storage 148
- Computer Setup—Security 150
- Computer Setup—Power 155
- Computer Setup—Advanced 156
- 8 Troubleshooting without 159
- Helpful hints 160
- Solving general problems 162
- Solving power problems 166
- Solving hard drive problems 167
- Solving display problems 171
- Solving audio problems 177
- Solving printer problems 179
- Solving Network Problems 185
- Solving memory problems 188
- Solving processor problems 190
- Solving software problems 196
- 9 POST error messages 198
- Resetting the password jumper 212
- 11 HP PC Hardware Diagnostics 215
- 12 System backup and recovery 217
- Creating recovery media 220
- System Restore 223
- System Recovery 224
- A Battery replacement 228
- B Power cord set requirements 231
- Country-specific requirements 232
- C Specifications 233
- SFF specifications 234
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