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47D-Link DCS-930 User Manual
Section 5 - Troubleshooting
Troubleshooting
1. Why does the LED not light up?
The power supply might be faulty. Conrm 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 page 30 for information
about how to enable the LED.
2. Why is the camera’s network connection unreliable?
There might be a problem with the network cable. To conrm 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 conrm the power for the devices are well connected and functioning properly.
3. Why does the Network Camera work locally but not remotely?
This might be caused by the rewall protection. Check the Internet rewall with your system administrator. The rewall 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 conicting with any Web server you may have running on your network.
The default router setting might be a possible reason. Check that the conguration of the router settings allow the Network Camera to be
accessed outside your local LAN.
4. Why does a series of broad vertical white lines appear through out the image?
It could be that the CMOS sensor (a square panel situated behind the lens that measures the light signals and changes it into a digital
format so your computer can present it into an image that you are familiar with) has become overloaded when it has been exposed to
bright lights such as direct exposure to sunlight or halogen lights. Reposition the Network Camera into a more shaded area immediately
as prolonged exposure to bright lights will damage the CMOS sensor.