Dell C1422Hf Manuale d'uso - Pagina 30

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Common problems

The following table provides general information about common monitor problems

you might encounter and the possible solutions:

Common symptoms

No video/Power LED off

No video/Power LED on

Poor focus

Missing pixels

Stuck-on pixels

Brightness problems

Synchronization problems

Safety related issues

Intermittent problems

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Troubleshooting

• 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.

• Verify if the device required more than 65W power charging.

• Ensure that the power button is pressed.

• Ensure that the USB Type-C cable is not damage.

• Increase brightness controls using the OSD.

• Perform monitor self-test feature check.

• Check for bent or broken pins in the video cable connector.

• Verify if the USB Type-C interface of the device can support DP alternate

mode.

• Set Windows to Projection mode.

• Eliminate video extension cables.

• Change the video resolution to the correct aspect ratio.

• Cycle power On-off.

• Pixel that is permanently off is a natural defect that can occur in LCD

technology.

• For more information about Dell Monitor Quality and Pixel Policy, see Dell

Support site at

https://www.dell.com/support/monitors.

• Cycle power On-off.

• Pixel that is permanently off is a natural defect that can occur in LCD

technology.

• For more information about Dell Monitor Quality and Pixel Policy, see Dell

Support site at:

https://www.dell.com/support/monitors.

• Adjust brightness controls using OSD.

• Perform monitor self-test feature check to determine if the scrambled

screen appears in self-test mode.

• Check for bent or broken pins in the video cable connector.

• Restart the computer in safe mode.

• Do not perform any troubleshooting step.

• Contact Dell immediately.

• Ensure that the video cable connecting the monitor to the computer is

connected properly and is secure.

• Perform monitor self-test feature check to determine if the intermittent

problem occurs in self-test mode.

Possible solutions