Question about LG 42CS570
Not hooked up to cable only antenna and Roku box. we get five channels and have never had problems with reception after hooking up powered antenna. however, there is one channel with weak signal and the tv seemed to get "stuck" on that channel a couple days ago; we went to bed and it worked fine twice the next morning .. then when we went to watch a show that evening it again got "stuck" on the one channel and stopped giving any video or audio reception. now it powers on and off with remote, but does NOT give any reception. no falls, impacts or weird stuff prior changed batteries in the remote to no avail. haven't called best buy to inquire about warranty, service, etc. what up with this tv less than 2 years old AND not a lot of use????
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Posted on Jan 02, 2017
I also had this same problem. Both the original remote and my universal remote failed to give any response on the TV. Normally the green light flashes when it receives a command from the remote. Called LG Support and they made me an appointment with a local repair company for 3 days later. This seemed pretty quick compared to other companies repair times I'd read about. However next day the repair company called to say it would be 5 more days before they could get a Tech to my location (downtown ATL). 8 days was a long time to wait but once tech arrived he diagnosed it to a bad board and simply went to his truck and swapped it out with mine under factory warranty. Everything has been fine since.
Posted on Jun 04, 2008
The problem your describing can be contributed to your cable box. Depending on your cable company there are times when the box has trouble translating the signal to the tv. You tv is operating normally. Suggest to the cable company to switch your box.
Posted on Dec 07, 2008
The fault may be on the control board. Sometimes the button switches can be stuck, or there may be something causing some conduction on the control circuit board. It is also possible to have a component failure that is causing a continuous command to keep the volume to the high position.
Something that causes failures of controls in TV sets is when people clean the screen, they spray liquid cleaner on the screen. Some of it drips down in to the controls and on to the circuit board. This will usually cause damage, and thus the set will require shop service.
Posted on Apr 10, 2009
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
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