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 seems to be frozen.Program in use has stopped 
responding to commands.1.If possible, use the Windows Task Manager to isolate and  terminate the 
o

						

							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 the requested resolution.The picture is broken up, rolls, jitters, 
or 


						

							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 System.
2.On the Hardware tab, select the Device Manager button.
3.Right-click the CD/DVD device and select Properties.
4.On the Properties tab, select Enable digital CD audio for 
this CD-ROM device.
Headphones or devices 
connected to the line-out 
connector have muted the 
internal speaker.Turn on and use headphones or external speakers, if 
connected, or disconnect headphones or external speakers.Volume is muted.1.From the Control Panel, select Sound, Speech and Audio 
Devices
, and then select Sounds and Audio Devices.
2.Deselect the Mute checkbox.
Computer is in Standby mode.Press the power button to resume from Standby mode.Noise or no sound comes out of the 
speakers or headphones.1.If you are using digital speakers that have a stereo jack  and you want the system to autoswitch to digital, use a 
stereo-to-mono adapter to engage the auto sense 
feature, or use multimedia device properties to switch  the audio signal from analog to digital.
2.If the headphones have a mono jack, use the multimedia 
device properties to switch the system to analog out.
NOTE:If you set digital as the Output Mode, the 
internal speaker and external analog speakers no longer 
output audio until you switch back to an auto sense or 
analog mode.
If you set analog as the Output Mode, external digital  speakers do not function until you change the output mode back to an auto-sense or digital mode.
Sound occurs intermittently.Processor resources are being 
used by other open applications.Shut down all open processor-intensive applications.Workstation appears to be locked up 
while recording audio.The hard disk might be full.1.Before recording, be sure there is enough free space on  the hard disk.
2.Try recording the audio 

						

							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 to the printer.Make the proper network connection to the printer.Printer might have failed.Run printer self-test.Printer does not turn on.The cables might not be 
connected properly. 
Solving power supply problems
This section presents power supply troubleshooting scenarios.
Testing power supply
Before replacing the power supply unit (PSU), use the Built-In Self-Test (BIST) feature to learn if the power 
supply still works.
NOTE:Not all PSUs have the BIST functionality. Refer to the Rearpanelcomponents section of this 
document to determine BIST availability for your workstation.
To test the power supply:
1.Unplug the AC power.
NOTE:For the HP Z840 Workstation, you must remove the power supply from the chassis.
2.Unplug all power cables to the system boards.
3.Plug in AC power and verify the following:


						

							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 processor heatsink.
Power LED 

						

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