Question about Sylvania Televison & Video
I purchased a HDMI/AVG cable to hook my descktop to the tv to view tv online and it will not show a picture, why is this happening?
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Posted on Jan 02, 2017
SOURCE: Low volume on LG HDTV
I encountered the same thing using the HDMI interface on my new TWC cable box (Motorola DCX-3200). After a little bit of research, I finally fixed it by changing the digital audio mode in the cable box using this procedure:
1. Be sure the TV is on and connected to the cable box.
2. Using the cable box remote turn power OFF.
3. Immediately press the MENU key on the remote. The USER SETTINGS menu should appear on the TV screen.
4. Select the ADDITIONAL HDMI SETTINGS >>> menu item.
5. The ADDITIONAL HDMI SETTINGS menu will appear.
6. Scroll to the AUDIO OUTPUT item and select this.
7. Change the setting from AUTO to L-PCM.
8. Return to the main page
9. Using the remote, cycle power OFF.
10. When the cable box is turned on again, you should be good to go.
I realize these instructions are specific to the DCX-3200, but there may be a similar setup option available in your cable box as well.
The problem here is that the cable box is by default configured to use Dolby Digital audio, which requires an additional 10dB of headroom to deal with the boosted LFE channel. If the cable operator hasn't taken pains to set the system up correctly (and most haven't, apparently), the digital audio level sent on the HDMI interface will be approximately 11dB down from normal analog line levels on the HDTV channels. Changing to straight linear PCM sets the TV receiver audio level on the HDTV channels to match the levels on the non-HD channels.
The only problem with this fix is that if you intend to feed a Home Theater receiver that uses Dolby Digital processing with the cable box output you will lose the Dolby encoding feature and be forced into straight 2-channel stereo. For a simple installation like mine where I'm just feeding the TV, this fix works fine. If you have a more complex setup that takes advantage of Dolby Digital features (when it's available in program material), you may have to live with the problem.
For a technical reference on why this happens, see http://www.megahz.com/specimages/Dolby/LM100%20Cable%20App%20Note%2011-05.pdf
Hope this is useful.
Posted on May 22, 2009
Try another hdmi wire. Physically look at the hdmi port and see if there is damage done to the port. Change the source. IE another cable box, xbox 360 dvd play etc. If all else fails, change SSB or Scaler. Depending on the set. It'll be one or the other. I don't have my information with me at the moment to distinguish which one you'll have.
Posted on Dec 08, 2009
I think the issue with mono and stereo here, since it is a built in option, is possibly how the program is broadcast.
You should be able to press the "Audio" button and switch between what is available. If you don't have other options, it may mean that that is not available for what you are watching. If you need more information, it is on page 15 of the owner's manual. Here is a link to where you can view it online - http://www.sylvaniaconsumerelectronics.com/pdf/manual/LC320SLX.pdf
Posted on Dec 20, 2009
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