Dell Technical Update Service - Dell Precision M6400 Service Manual

Troubleshooting: Dell Precision M6400 Service Manual
Connect an external monitor —
1. Shut down your computer and connect an external monitor to the computer.
2. Turn on the computer and the monitor and adjust the monitor brightness and contrast controls.
If the external monitor works, the computer display or video controller may be defective. Contact Dell Support.

Dell Technical Update Service

The Dell Technical Update service provides proactive e-mail notification of software and hardware updates for your computer.
The service is free and can be customized for content, format, and how frequently you receive notifications.
To enroll for the Dell Technical Update service, go to support.dell.com.
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