HP Compaq dx2300 and dx2308 Business PC Service Reference Guide, 1st Edition

Solving General Problems

You may be able to easily resolve the minor problems described in this section.

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.

Unit is in an exceedingly hot environment. Let it cool down.

Ensure that computer air vents are not blocked and the

internal fan is running.

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.

Press and hold the power button for at least four seconds

until the computer turns off.

Disconnect the power cord from the electrical outlet.

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.

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.

ENWW Solving General Problems 85