HP Z 440 Owners Manual

During operation

Troubleshooting scenarios and solutions
This section presents troubleshooting scenarios and possible solutions for a Windows-based system.
Solving minor problems
ProblemCausePossible SolutionWorkstation appears frozen and 
does not shut down when the 
power button is pressed.Software control of the power 
switch is not functional.1.Press and hold the power button for at least four seconds  until the computer shuts down.
2.Disconnect the electrical plug from the outlet.
3.Restart the computer.
Workstation...

ProblemCausePossible Solution2.Repeat this process until the faulty device is identi

Solving hard drive problemsProblemCauseSolutionHard drive errorHard disk has bad sectors or has 
failed.Locate and block the usage of bad sectors. If necessary, 
reformat the hard disk.
If the drive is detected by the BIOS, run DPS Self-test.
Disk transaction problemThe directory structure is bad, or 
there is a problem with a 

Solving display problems
These suggestions apply to monitors connected to desktop and tower con

ProblemCauseSolutionCables are not properly connected.Verify that the graphics cable is connected to the graphics 
card and the monitor.Blurry video or requested resolution 
cannot be set.If the graphics controller was 
upgraded, the correct video 
drivers might not be loaded.Install the video drivers included in the upgrade kit, or 
download and install the latest drivers for your graphics card 
from 
http://welcome.hp.com/country/us/en/support.html.
Monitor cannot display 
requested resolution.Change...

Solving audio problemsProblemCauseSolutionSound does not come out of the 
speaker or headphones.Software volume control is 
turned down.Double-click the Speaker icon on the taskbar and use the 
volume slider to adjust the volume.The external speakers are not 
turned on.Turn on the external speakers.External speakers plugged into 
the wrong audio jack.See your sound card documentation for proper speaker 
connection.Digital CD audio is not enabled.Enable digital CD audio:
1.From the Control Panel, select...

Solving printer problemsProblemCauseSolutionPrinter does not print.Printer is not turned on and 
online.Turn the printer on and be sure it is online.The correct printer driver for the 
application is not installed.1.Install the correct printer driver for the application.
2.Try printing using the MS-DOS command:
DIR C:\> [printer port]
Replace printerport with the address of the printer 
used. If the printer works, reload the printer driver.
If you are on a network, you 
might not have made a 
connection...

ProblemCauseSolutionevery second), followed by a two-
second pause.A fan might be blocked or not 
turning.
OR
The processor heatsink fan 
assembly is not properly 
attached to the processor.
2.Open the access panel and press the workstation power  button.
3.Verify that the system fan is running.
4.Verify that the processor heatsink fan spins.
If the heatsink fan is not spinning, verify that the fan cable is plugged into the system board connector. Verify that the fan is properly seated.
5.Replace the...

Diagnostic codes and errors
This section presents information about diagnostic LED codes, LED color de