Table of Contents
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Index
A
access panel
locked 81
administrator password 109
audible codes 107
audio problems 86
B
backup, creating 97
backups 97
battery
disposal 19
battery replacement 31
beep codes 107
BIOS
clearing and resetting 111
boot order, changing 101
booting options
Full Boot 102
Quick Boot 102
bottom components
HP ProOne 400 20-inch 5
HP ProOne 600 3
C
cable management 20
cable pinouts, SATA data 20
cautions
AC power 14
cables 19
electrostatic discharge 14
keyboard cleaning 17
keyboard keys 18
chassis types, illustrated 14
cleaning
computer 17
mouse 18
safety precautions 17
CMOS
backing up 109
components
HP ProOne 400 20-inch 4
HP ProOne 400 20-inch 400
front 4
HP ProOne 400 20-inch bottom
5
HP ProOne 400 20-inch rear 5
HP ProOne 400 20-inch side 4
HP ProOne 400 23.8-inch 2
HP ProOne 400 23.8-inch
bottom 3
HP ProOne 400 23.8-inch front 2
HP ProOne 400 23.8-inch rear 3
HP ProOne 400 23.8-inch side 2
internal 23
computer cleaning 17
Computer Setup
access problem 80
country power cord set
requirements 113
Customer Support 78
D
display panel
removing 50
drive
2.5-inch, removing 24
optical drive, replacing 26
E
electrostatic discharge (ESD) 14
preventing damage 15
error
codes 102, 107
messages 102
F
F10 Setup
access problem 80
fan
illustrated 9
removing 35
features
overview 1
fixed-height stand
removing 21
flash drive problems 94
flashing LEDs 107
front components
HP ProOne 400 20-inch 4
HP ProOne 400 23.8-inch 2
G
general problems 80
grounding methods 15
H
hard disc drive
2.5-inch, removing 24
hard drive
proper handling 19
hard drive problems 84
hardware installation problems 89
heat sink
illustrated 8
removing 36
helpful hints 79
hood sensor
removing 34
HP PC Hardware Diagnostics UEFI
downloading 75
starting 75
using 74
HP PC Hardware Diagnostics Windows
downloading 73
installing 74
using 73
HP ProOne 400 20-inch
components 4
HP ProOne 400 23.8-inch
components 2
HP Recovery Manager
correcting boot problems 101
starting 100
HP Recovery media
recovery 100
using 98
HP Recovery partition
recovery 100
removing 101
HP Sure Start 119
Index 121
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