Compaq dx2810 Service Reference Guide: HP Compaq dx2810 and dx2818 Business PC - Page 150

Cause, Solution, CAUTION, arrow, keys on the keypad.

Get Compaq dx2810 - Microtower PC PDF manuals and user guides View all Compaq dx2810 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 150 highlights

Computer will not respond to USB keyboard or mouse. Cause Solution System has locked up. Restart computer. Keyboard or mouse is not connected to computer. Connect keyboard and mouse cables to computer. Computer is in standby mode. To resume from standby mode, press the power button or press any key. CAUTION: When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data. Computer date and time display is incorrect. Cause Solution RTC (real-time clock) battery may need to be replaced. NOTE: Connecting the computer to a live AC outlet prolongs the life of the RTC battery. First, reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Hardware Reference Guide for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement. Cursor will not move using the arrow keys on the keypad. Cause Solution The Num Lock key may be on. Press the Num Lock key. The Num Lock light should not be on if you want to use the arrow keys. The Num Lock key can be disabled (or enabled) in Computer Setup. Poor performance is experienced. Cause Processor is hot. Hard drive is full. Low on memory. 140 Appendix C Troubleshooting Solution 1. Make sure airflow to the computer is not blocked. Leave a 10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit the required airflow. 2. Make sure fans are connected and working properly (some fans only operate when needed). 3. Make sure the processor heatsink is installed properly. Transfer data from the hard drive to create more space on the hard drive. Add more memory.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
Computer will not respond to USB keyboard or mouse.
Cause
Solution
System has locked up.
Restart computer.
Keyboard or mouse is not connected to computer.
Connect keyboard and mouse cables to
computer.
Computer is in
standby
mode.
To resume from
standby
mode, press the power
button or press any key.
CAUTION:
When attempting to resume from
standby
mode, do not hold down the power
button for more than four seconds. Otherwise, the
computer will shut down and you will lose any
unsaved data.
Computer date and time display is incorrect.
Cause
Solution
RTC (real-time clock) battery may need to be
replaced.
NOTE:
Connecting the computer to a live AC
outlet prolongs the life of the RTC battery.
First, reset the date and time under
Control
Panel
(Computer Setup can also be used to
update the RTC date and time). If the problem
persists, replace the RTC battery. See the
Hardware Reference Guide
for instructions on
installing a new battery, or contact an authorized
dealer or reseller for RTC battery replacement.
Cursor will not move using the
arrow
keys on the keypad.
Cause
Solution
The
Num Lock
key may be on.
Press the
Num Lock
key. The Num Lock light
should not be on if you want to use the
arrow
keys.
The
Num Lock
key can be disabled (or enabled)
in Computer Setup.
Poor performance is experienced.
Cause
Solution
Processor is hot.
1.
Make sure airflow to the computer is not
blocked. Leave a 10.2-cm (4-inch) clearance
on all vented sides of the computer and above
the monitor to permit the required airflow.
2.
Make sure fans are connected and working
properly (some fans only operate when
needed).
3.
Make sure the processor heatsink is installed
properly.
Hard drive is full.
Transfer data from the hard drive to create more
space on the hard drive.
Low on memory.
Add more memory.
140
Appendix C
Troubleshooting