Dell D2421DS Benutzerhandbuch - Seite 41

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Troubleshooting

WARNING:

Before you begin any of the procedures in this section, follow the

Safety Instructions

Common Problems

The following table contains general information about common monitor problems you

might encounter and the possible solutions.

Common Symptoms What You

No Video/Power LED

off

No Video/Power LED

Poor Focus

Experience

No picture

No picture or no

brightness

Picture is fuzzy,

blurry, or ghosting

Possible Solutions

• Ensure that the video cable connecting

the monitor and the computer is

properly connected and secure.

• Verify that the power outlet is

functioning properly using any other

electrical equipment.

• Ensure that the power button is

depressed fully.

• Ensure that the correct input source is

selected via the

Input Source

button.

• Increase brightness & contrast controls

via OSD.

• Perform monitor self-test feature

check.

• Check for bent or broken pins in the

video cable connector.

• Ensure that the correct input source is

selected via the

Input Source

menu.

• Perform Auto Adjust via OSD.

• Adjust the Phase and Pixel Clock

controls via OSD.

• Eliminate video extension cables.

• Reset the monitor to

• Change the video resolution to the

correct aspect ratio (16:9).

Troubleshooting

select

Factory

Reset.

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