Solving General Problems - HP dx2308 - Microtower PC Service & Reference Manual

Solving General Problems

You may be able to easily resolve the minor problems described in this section.
Computer will not turn on.
Cause
Cables to the external power source are unplugged.
Voltage selector switch on rear of computer chassis (some
models) not switched to correct line voltage (115V or 230V).
A defective PCI card has been installed.
Drive data or power supply cables may not be properly
connected.
The unit temperature was exceeded. The fan may be blocked.
Computer appears locked up and will not turn off when the power button is pressed.
Cause
Software control of the power switch is not functional.
Computer will not respond to USB keyboard or mouse.
Cause
System has locked up.
Keyboard or mouse is not connected to computer.
Computer is in standby mode.
Computer date and time display is incorrect.
Cause
RTC (real-time clock) battery may need to be replaced.
ENWW
Solution
Ensure that cables connecting the computer to the external
power source are plugged in properly and the wall outlet is
active.
Select the proper AC voltage using the selector switch.
Remove any expansion board that was just installed.
Reseat drive data and power supply cables.
Unit is in an exceedingly hot environment. Let it cool down.
1.
Ensure that computer air vents are not blocked and the
2.
internal fan is running.
Solution
Press and hold the power button for at least four seconds
1.
until the computer turns off.
Disconnect the power cord from the electrical outlet.
2.
Solution
Restart computer.
Connect keyboard and mouse cables to computer.
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.
Solution
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.
Solving General Problems 85