HP Workstation z400

Customizing the monitor display
You can manually select or change the monitor model, refresh rates, screen resolution, color settings,
font sizes, and power management settings. To do so, right-click the desktop, then click Properties to
change display settings. For more information, see the online documentation provided with the graphics
controller utility or the documentation that came with your monitor.
Troubleshooting scenarios and solutions
This section presents an extensive overview of various troubleshooting scenarios and possible solutions
for a Windows-based workstation.
NOTE: For Linux troubleshooting information, refer to the HP Workstations for Linux User Manual
at
http://www.hp.com/support/linux_user_manual.
Solving minor problems
Table 11-1 Minor problems
Problem Cause Possible Solution
Workstation 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 workstation shuts
down.
2. Disconnect the electrical plug from the
outlet.
3. Restart the workstation.
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 offending
process.
2. Attempt the normal Windows shutdown
procedure.
3. Restart the workstation using the power
button.
Workstation date and
time display is incorrect.
Real-time clock (RTC)
battery might need
replacement.
1. Reset the date and time in the Control
Panel.
2. Replace the RTC battery.
Workstation appears to
pause periodically.
Network driver is loaded
and no network connection
is established.
Establish a network connection, or use the
Computer Setup (F10) Utility or the Microsoft
Windows Device Manager to disable the
network controller.
Cursor does not move
using the arrow keys on
the keypad.
The Num Lock key
might be on.
Press Num Lock. The Num Lock key can be
disabled or enabled in the Computer Setup
(F10) Utility.
Poor performance is
experienced.
Processor is hot. 1. Verify that airflow to the workstation is not
blocked.
2. Verify that chassis fans are connected and
working properly. Some fans operate only
when needed.
3. Verify that the processor heatsink is
installed properly.
66 Chapter 11 Diagnostics and troubleshooting ENWW