A link to "Troubleshoot your Business TV service" will be sent via email.
We hate spam. The information you've entered will not be shared or sold.
If you are having problems with your TV service, double-checking the settings, equipment and connections could help solve them. For specific ways to troubleshoot some common problems, read on.
If there is no picture or no sound (includes black/blue screen and snow)
If there is sound, but no picture on HD channels
If there is no guide on HD channels
If there is tiling/pixelation/freezing or "One Moment Please" message displays
If there are vertical black bars on HD channels
If the picture is clear but the colors are wrong
If you can view HD channels, but not in HD quality
If the screen is only partially displayed on an HD channel
If the picture doesn't fill the screen
If there is no audio, but the picture displays normally
White dashes across the top of the screen
Some TV boxes offer the ability to modify settings such as the display output type, output volume, etc.
The user manual for each Comcast TV box can be found here.
If your service includes HD service, connect your HDTV and HD TV box with HDMI or component cabling.
If your service doesn't include HD service, you will not receive HD channels even if you have an HD TV box or an HDTV. Call us at 1-800-391-3000 to upgrade your service to HD.
Always verify that your devices and connections are configured correctly and securely installed.
Check that the TV box is on.
Confirm that the television is set to the correct input.
Verify that you subscribe to the channel you're trying to watch.
Confirm you are tuned to an HD channel.
Double check all connections and make sure you're using HDMI or component cables.
See if you are able to view other HD channels.
Try unplugging your TV box and TV from the power for 30 seconds and then plug them back in. Wait 2 to 3 minutes for the TV box to load before powering on the TV and TV box.
If none of these suggestions help, call us at 1-800-391-3000.
Back to top
Verify that you subscribe to the channel you are trying to watch.
Double check all connections between the TV and TV box, and make sure you are using HDMI or component cables.
Check that you have the correct input in your HDTV for your connection type.
Make sure you set the output on the TV box to match the display capability of your television (480i or 480p for standard definition; 720p, 1080i, or 1080p for HD).
Confirm you are using HDMI or component cables.
Check that you have set the correct input on your TV for your connection type.
Double check that all connections are secure and tight, especially the coax cable going to the TV box from the wall outlet.
Reseat the coax cable by unscrewing and reconnecting the cable at both ends. Check the cable for any damage. A loose or damaged cable can cause picture quality issues.
If that doesn't help, call us at 1-800-391-3000.
This is because the program was not produced in HD. This is often seen on older television programs.
Make sure your YPbPr configuration is right: Y to Y, Pb to Pb, and Pr to Pr (component cables).
See if the RCA style cables and jacks have become loose.
Check the color adjustments on the TV. (For instructions, refer to your owner's manual or the TV manufacturer.)
Visit the programmer's website to confirm the program you're watching is broadcast in HD.
Confirm you're tuned to an HD channel.
Double-check all connections and make sure you're using HDMI or component cables.
See if you're able to view other HD channels.
Visit the programmer's website to confirm the program you're watching is broadcast in HD. Not all programs are broadcast in true HD.
Check display settings of the television to ensure that it is set to display in HD format (ensure the aspect ratio is set properly).
Refer to your owner's manual or the TV manufacturer for instructions to change your TV settings.
If you can't get specific instructions, follow these general instructions:
Press either the Menu or Settings button on the remote control that came with your TV.
Select the menu item called Video Format, Aspect Ratio, Display, or something similar.
Select the various options (may include Widescreen, Wide, Zoom, Squeeze, or Stretch) until the picture fills the screen.
Note: Setting a standard definition channel to fill the screen will cause HD channels to expand beyond the screen edges.
Check cabling to ensure that connections are tight and connected to the proper outlet.
If connected to a home theater or stereo system, ensure the receiver is in the correct mode for the input coming from the TV box. Check that all connections are tight and correctly routed.
Verify the TV or audio system is not muted by pressing the mute button on the remote for that device.
For a DTA (Digital Transport Adapter), press the LANG button.
Some TVs with HDMI connections do not or cannot overscan (fill the screen). By using a component input to the TV instead of HDMI, the problem will likely go away as overscanning does happen with most component connections.
If the TV does have an overscan option (refer to the manual) set the overscan option of the television to 'On' when watching an SD source from the HDTV. It will slightly alter the amount of picture scaling and should not degrade the picture. Setting overscan to 'Off' will only improve picture quality when watching a Full HD (1080) source, but can also be the source of the white dashes.
If neither solution solves the problem, contact the manufacturer of the television set for further assistance.
Thank you! We've received your information.
With Comcast Business TV, you can stay connected with access to the latest news, finance, sports, and pop trends.
Comcast Business TV packages meet your core needs by keeping costs down while including popular cable networks.
As your business grows, you may want to add Comcast Business TV to additional television sets at your location.
Symantec, the Symantec Logo, the Checkmark Logo, and Norton, Norton 360 and Norton by Symantec are registered trademarks of Symantec Corporation ©2014 Symantec Corporation. All rights reserved. Microsoft product names and logos are trademarks or registered trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners.