Compaq dx2818 - Microtower PC Especificaciones Pagina 149
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If you have installed an operating system other than the factory-installed operating system, check
to be sure that it is supported on the system.
●
If the system has multiple video sources (embedded, PCI, or PCI-Express adapters) installed and
a single monitor, the monitor must be plugged into the monitor connector on the source selected
as the primary VGA adapter. During boot, the other monitor connectors are disabled and if the
monitor is connected into these ports, the monitor will not function. You can select which source
will be the default VGA source in Computer Setup.
CAUTION: When the computer is plugged into an AC power source, there is always voltage applied
to the system board. You must disconnect the power cord from the power source before opening the
computer to prevent system board or component damage.
Solving General Problems
You may be able to easily resolve the minor problems described in this section. If a problem persists
and you are unable to resolve it yourself or if you feel uncomfortable about performing the operation,
contact your HP authorized reseller or service provider.
Computer will not turn on.
Cause
Solution
Cables to the external power source are
unplugged.
Ensure that cables connecting the computer to the
external power source are plugged in properly and
the wall outlet is active.
Voltage selector switch on rear of computer
chassis (some models) not switched to correct line
voltage (115V or 230V).
Select the proper AC voltage using the selector
switch.
A defective PCI card has been installed. Remove any expansion board that was just
installed.
Drive data or power supply cables may not be
properly connected.
Reseat drive data and power supply cables.
The unit temperature was exceeded. The fan may
be blocked.
1. Unit is in an exceedingly hot environment. Let
it cool down.
2. Ensure that computer air vents are not
blocked and the internal fan is running.
3. Contact an HP authorized reseller or service
provider.
Computer appears locked up and will not turn off when the power button is pressed.
Cause
Solution
Software control of the power switch is not
functional.
1. Press and hold the power button for at least
four seconds until the computer turns off.
2. Disconnect the power cord from the electrical
outlet.
Solving General Problems 139
- Service Reference Guide 1
- About This Book 3
- Table of contents 5
- 1 Product Features 11
- Rear Panel Components 13
- Keyboard 15
- Using the Windows Logo Key 16
- Serial Number Location 17
- Computer Setup—Main 21
- Computer Setup—Advanced 22
- Computer Setup—Power 24
- Computer Setup—Boot 25
- Computer Setup—Exit 26
- HP Insight Diagnostics 27
- Survey Tab 28
- Diagnose Tab 28
- Test Tab 29
- Status Tab 30
- Help Tab 31
- Protecting the Software 32
- Features 34
- SMART ATA Drives 35
- Hard Drive Capacities 35
- Chassis Designations 36
- Figure 6-3 Model dx2818 37
- Chassis Designations 27 37
- Small Form Factor (SFF) 38
- Generating Static 38
- Grounding the Work Area 40
- Operating Guidelines 41
- Routine Care 42
- Service Considerations 43
- Cables and Connectors 44
- Hard Drives 44
- Lithium Coin Cell Battery 45
- Microtower (MT) Chassis 46
- Preparation for Disassembly 47
- Access Panel 48
- Front Bezel 49
- Bezel Blanks 50
- Expansion Cards 55
- Cable Management 59
- Cable Connections 60
- Drive Positions 61
- Power Switch/LED Assembly 77
- System Fan 78
- Heatsink assembly 79
- Hood Sensor 91
- Port Cover 92
- Installing Additional Drives 100
- Removing an Optical Drive 102
- DDR2-SDRAM DIMMs 114
- Populating DIMM Sockets 115
- Installing DIMMs 116
- Front I/O Device 124
- Power Switch Assembly 125
- Heatsink 127
- Processor 128
- Power Supply 129
- System Board 131
- Type 1 Battery Holder 133
- Type 2 Battery Holder 133
- Type 3 Battery Holder 134
- Installing a Security Lock 135
- HP Business PC Security Lock 136
- A Connector Pin Assignments 138
- Parallel Interface 139
- Microphone 140
- Headphone 140
- Line-in Audio 140
- Line-out Audio 140
- 24-Pin Power 141
- PCI Express 142
- 4-Pin Power (for CPU) 144
- B Power Cord Set Requirements 145
- Country-Specific Requirements 146
- C Troubleshooting 147
- Helpful Hints 148
- Solving General Problems 149
- Audible Codes 153
- Contacting Customer Support 155
- D Specifications 156
- Small Form Factor 157
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