Video And Monitor Problems; If The Screen Is Blank; If The Screen Is Difficult To Read - Dell Precision 390 User Manual

Adjust the Windows volume control —
volume is turned up and that the sound is not muted.
Video and Monitor Problems
Fill out the Diagnostics Checklist as you complete these checks.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

If the screen is blank

NOTE: See the monitor documentation for troubleshooting procedures.
Check the monitor cable connection —
If you purchased a graphics card, ensure that the monitor is connected to the card.
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Ensure that your monitor is properly connected (see the Quick Reference Guide that came with your computer).
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If you are using a graphics extension cable and removing the cable solves the problem, the cable is defective.
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Swap the computer and monitor power cables to determine if the power cable is defective.
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Check the connector for bent or broken pins. (It is normal for monitor cable connectors to have missing pins.)
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Check the monitor power light —
is lit or blinking, the monitor has power. If the power light is blinking, press a key on the keyboard or move the mouse.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Test the monitor — Connect a properly working monitor to the computer, and try using the monitor. If the new monitor works, the original
monitor is faulty.
Check the Diagnostic Lights — See
Check the card setting — Enter system setup (see
Integrated Devices option is set correctly. For an AGP card, set Primary Video Controller to AGP. For a PCI card, set Primary Video
Controller to Auto. Exit system setup and restart your computer.
Run the Dell Diagnostics — See

If the screen is difficult to read

Check the monitor settings — See the monitor documentation for instructions on adjusting the contrast and brightness, demagnetizing
(degaussing) the monitor, and running the monitor self-test.
Move the subwoofer away from the monitor —
(2 ft) away from the monitor.
Move the monitor away from external power sources —
the screen image to appear "shaky." Turn off nearby devices to check for interference.
Adjust the Windows display settings —
1. Click the Start button, click Control Panel, and then click Appearance and Themes.
2. Click Display and click the Settings tab.
3. Try different settings for Screen resolution and Color quality.
Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the
If the power light is off, firmly press the button to ensure that the monitor is turned on. If the power light
Diagnostic Lights.
Entering System
Dell Diagnostics
If your speaker system includes a subwoofer, ensure that the subwoofer is at least 60 cm
Fans, fluorescent lights, halogen lamps, and other electrical devices can cause
Setup) and ensure that Primary Video Controller under the