●
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
(embedded video on some models only) and a single monitor, the monitor must be plugged into
the monitor connector on the source selected as the primary input source. 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 input 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.
Basic Troubleshooting
You can find troubleshooting information in the comprehensive Maintenance and Service Guide
(English only) available under the reference library at
http://www.hp.com/support. Select your country
and language, select See support and troubleshooting information, enter the model number of the
computer, and press Enter.
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes
If you see flashing LEDs on the front of the computer or if you hear beeps, see the Maintenance and
Service Guide (English only) for interpretation and recommended action.
Restore and Recovery
Microsoft System Restore
If you have a problem that might be due to software that was installed on your computer, use System
Restore to return the computer to a previous restore point. You can also set restore points manually.
NOTE: Always use this System Restore procedure before you use the System Recovery program.
NOTE: Some features might not be available on systems that are shipped without a version of
Microsoft Windows.
To start a System Restore:
1. Close all open programs.
2. Click the Start button, right-click Computer, and then click Properties.
3. Click System protection, System Restore, click Next, and then follow the onscreen
instructions.
To add restore points manually:
1. Close all open programs.
2. Click the Start button, right-click Computer, click Properties, and then click System
protection.
ENWW Basic Troubleshooting 7
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