D-Link DCS-931L user manual Troubleshooting Why does the LED not light up?

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Section 4 - Troubleshooting

3. Why does the LED not light up?

The power supply might be faulty. Confirm that you are using the provided DC 5V power supply for this network camera. Verify that the power supply is correctly connected. If the camera is functioning normally, the LED may have been disabled. See“Admin”on page 38 for information about how to enable the LED.

4. Why is the camera’s network connection unreliable?

There might be a problem with the network cable. To confirm that the cables are working, PING the address of a known device on the network. If the cabling is OK and your network is reachable, you should receive a reply similar to the following (…bytes = 32 time = 2 ms).

Another possible problem may be that the network device such as a hub or switch utilized by the Network Camera is not functioning properly. Please confirm the power for the devices are well connected and functioning properly.

5. Why does the Network Camera work locally but not remotely?

This might be caused by the firewall protection. Check the Internet firewall with your system administrator. The firewall may need to have some settings changed in order for the Network Camera to be accessible outside your local LAN. For more information, please refer to the section about installing your camera behind a router.

Make sure that the Network Camera isn’t conflicting with any Web server you may have running on your network.

The default router setting might be a possible reason. Check that the configuration of the router settings allow the Network Camera to be accessed outside your local LAN.

6. Why does a series of broad vertical white lines appear through out the image?

It could be that the image sensor has become overloaded when it has been exposed to bright light such as direct exposure to sunlight or halogen lights. Reposition the camera into a more shaded area immediately, as prolonged exposure to bright lights will damage the sensor.

7. The camera is producing noisy images. How can I solve the problem?

The video images might be noisy if the camera is used in a very low light environment.

D-Link DCS-931L User Manual

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Contents Wireless N H.264 Network Camera Description Manual Overview Manual RevisionTrademarks Table of Contents ProductPackageOverviewContents Introduction Features Hardware Overview Front ViewRear View Installation Zero Configuration Setup Connect the Ethernet CableCheck Your mydlink Account Installation Camera Installation Wizard Windows UsersMac Users Manual Hardware Installation Optional Use WPS to Connect WirelesslyWireless Installation Considerations WPS Push Button Setup To create a WPS connection StepMydlink Configuration Using the Web Configuration InterfaceLive Video Compression FormatSetup WizardInternet Connection Setup Wizard Configuration Network Setup Wireless Setup WirelessTo Connect Extender SetupExtender Mode Enable PasswordHost Name User NameImage Setup MirrorControl Contrast ControlVideo Audio Motion Detection Sound Detection LevelMail AddressMail account E-mail Interval specified AccountFTP FTP server the Image Frequency specifiedConfiguration Time and Date You want to apply daylight saving correctionsMaintenance AdminDevice SystemDrive File button Firmware Upgrade Status Device InfoActive User Troubleshooting TroubleshootingWhat is Remote Access? How do I enable it? What can I do if I forget my password?Why does the Network Camera work locally but not remotely? Troubleshooting Why does the LED not light up?Why is the camera’s network connection unreliable? Why are no images available through the Web browser? Technical Specifications Technical Specifications Viewing Angle Storage Temperature Emission EMI, Safety & Other CertificationsPower Dimensions W x D x H