Troubleshooting Guide

Troubleshooting Guide www.hp.com 2–5

Troubleshooting Without Diagnostics

■ Be sure that all the needed device drivers have been installed. For

example, if you are using a printer, you need a driver for that

model printer.

■ Remove all bootable media (diskette, CD, or USB device) from

the system before turning it on.

■ 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 select

models only) 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.