HP FL939UT User Manual download pdf (Page 184)

During operation

●

Look for blinking LEDs on the front of the workstation. The blinking lights are error codes that will

help you diagnose the problem. Refer to the Diagnostic lights and audible (beep) codes section of

this document for information on interpreting diagnostic lights and audible codes.

●

Press and hold any key. If the system beeps, then your keyboard is operating correctly.

●

Check all cables for loose or incorrect connections.

●

Wake the workstation by pressing any key on the keyboard or the power button. If the system

remains in suspend mode, shut down the system by pressing and holding the power button for at

least four seconds, then press the power button again to restart the system. If the system does not

shut down, unplug the power cord, wait a few seconds, then plug it in again. If it does not restart,

press the power button to start the workstation.

●

Reconfigure the workstation after installing a non–plug and play expansion board or other option.

Refer to the Hardware installation problems section of this document for instructions.

●

Be sure that all required device drivers have been installed. For example, if you have connected

a printer, you must install a printer driver.

●

If you are working on a network, plug another workstation with a different cable into the network

connection. There might be a problem with the network plug or cable.

●

If you recently added new hardware, remove the hardware and verify if the workstation functions

properly.

●

If you recently installed new software, uninstall the software and verify if the workstation functions

properly.

●

If the screen is blank, plug the monitor into a different video port on the workstation if one is

available. Alternatively, replace the monitor with a monitor that you know is working properly.

●

Upgrade the BIOS. A new release of the BIOS might have been released that supports new features

or fixes your problem.

●

For more detailed information, see the troubleshooting chapter in the Service and Technical

Reference Guide at

http://www.hp.com/support/workstation_manuals.

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.

172 Chapter 6 Diagnostics and troubleshooting ENWW

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