Solving Display Problems
If you encounter display problems, see the documentation that came with the monitor and to the common causes and solutions listed in the following table.
Table
Only two display ports work.
Cause | Solution |
On an HP Compaq Elite 8300 USDT with no MXM card and a 2nd Generation (Sandy Bridge) processor, if you attach three monitors to the system, only two display outputs are supported.
This issue depends on if you connect the third monitor when the system is powered off or if the system is up and running in Windows.
If the third monitor is connected when the system is:
●Powered off: The VGA and top DisplayPort will be active during POST.
●Running in Windows: Windows selects two of the three ports. If you want to change the configuration, you can access the graphics icon in the system tray and change the configuration to select the two preferred outputs. Once set, the selected configuration remains in effect until it is changed.
Blank screen (no video).
Cause | Solution |
|
|
Monitor is not turned on and the monitor light is not on. | Turn on the monitor and check that the monitor light is on. |
|
|
Bad monitor. | Try a different monitor. |
|
|
The cable connections are not correct. | Check the cable connection from the monitor to the computer |
| and to the electrical outlet. |
|
|
You may have a screen blanking utility installed or energy | Press any key or click the mouse button and, if set, type your |
saver features are enabled. | password. |
|
|
System ROM is corrupted; system is running in Boot Block | Reflash the system ROM with the latest BIOS image. |
Emergency Recovery Mode (indicated by eight beeps). |
|
|
|
You are using a | Be sure that the monitor can accept the same horizontal |
resolution chosen. | scan rate as the resolution chosen. |
|
|
Computer is in standby mode. | Press the power button to resume from standby mode. |
| 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. |
Monitor cable is plugged into the wrong connector.
Systems may have a monitor connection on both the motherboard or an
Solving Display Problems 265