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TRENDnet User’s Guide
TV-IP851WC / TV-IP851WIC
42
Troubleshooting
1. The Power LED and Ethernet Activity LED do not light up.
The power supply or camera might be faulty. Check that the connection to both
the power source and the terminal on the back of the camera are secure and
that you are using the provided power supply. If the camera is otherwise
functioning correctly, the LEDs might have been disabled in the configuration.
See the section of this guide on Configuration of System settings.
2. The camera can’t be accessed or access is slow
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.
3. The camera can be accessed locally but not remotely
This might be caused by a firewall. 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.
4. White vertical lines appear on the image from the camera
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.
5. The camera images are ‘noisy’
Often if the camera is in a low-light environment, the images can contain a lot
of noise. Try enabling Night mode and see if that improves the image quality.
Otherwise, try to use the camera in a location where there is a bit more light.
6. The camera images are of poor quality.
Make sure that your computer’s display properties are set to at least 16-bit
color. Using 16 or 256 colors on your computer will produce dithering artifacts
in the image, making the image look as if it is of poor quality.
Try also adjusting the brightness, contrast, saturation, light frequency and anti-
flicker controls on the Video Settings under the Configuration menu. You may
also consider adjusting the resolution of the camera and the compression rate
to improve the image.
7. Video can’t be viewed through the web browser interface.
ActiveX might be disabled. If you are viewing the images from Internet Explorer
make sure ActiveX has been enabled in the Internet Options menu. You may also
need to change the security settings on your browser to allow the ActiveX plug-
in to be installed.
If you are using Internet Explorer with a version number lower than 6, then you
will need to upgrade your Web browser software in order to view the
streaming video transmitted by the Network Camera. Try also viewing the
video using Java. Ensure that you have the latest version of Java installed
before you do. Go to www.java.com for more information.