My Brand New 40" westing

Try to unplug power from set for a while and plug back to reboot--immediately delete that channel from the set's memory as it may contain signal that is causing this.

Also look to see if the set has a feature to lock out the buttons and or the remote control---a few do.

Most likely something in the signal for that set caused the set to lock up.

John, do you have an HD cable box? If not, you will not be able to watch anything in HD....call your cable provider if you don't have it.
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I have the same problem, but with no picture at all on my HD Channels. All I did was to retune my TVs analogue channels and bingo I got all my HD Channels back. My HD Set Top Box is still showing as locked.

Your source has to be in HD like a local broadcast TV station currently broadcasting in HD which you get with a VHF/UHF antenna connected to the HDTV. Most primetime TV shows are in HD so using the antenna on the HDTV is all you need. Press MENU on your TV remote and make sure you have ANTENNA set instead of cable to get local TV stations.

You also could use your local cable TV provider. You would need digital cable service and a HD cable box with HDMI or component video cable hookup to the HDTV. HD channels are typically above 100. Call your cable TV provider for more details.

Read your user manual for the LG TV. Ask for help from family, friends, neighbors, local electronics shops.

could possibly be a Line noise issue from your cable provider, if it's an analog signal. I would try another room in the house to see if your problem goes away. If not, it may be something your cable company may have to look into. This may also be associated with intermittent connectivity if you have cable internet as well.

Hello,
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EX: local Fox channel on 47---autoprogram and check 47-1

If this is enough HD for you then get a two way spitter and hook your box back up and keep using the RCA (composite) cables for the best it can produce.

hope this will help..

The signal board is bad. Replace this board, its the one with the rca jacks and rf connectors. Warranty work will cover this repair. As we say in Nebraska.......Getter Done!!!!!

I just got the same exact one, when it searches automatically the first time it doesn't look for digital channels. go to Menu>manual channel search>cable. it will look for all possible signals and will take forever probably. the free digital channels will take several seconds to switch channel to channel, but they're there! They will show up on your screen as "DC 91-2" or similar. you can switch back to regular cable channels with the input button, you just cycle through all the inputs. hope that helps.

Saying that the problem is with your TV doesn't make any sense since your TV is fed from the cable box.  Your TV doesn't know one channel from the next.  If it had a problem it would effect all channels.  You may not have enough signal to the INPUT of your cable box due to a problem on the pole or at your house or both.  Insufficient signal can cause some digital channels to not get decoded properly by the cable box.  The lower channels will show noise symptoms such as what you describe but they won't crap out altogether like the digital ones.  Have a cable tech come out and measure the signals.

Do you have splitters in line with the cable anywhere?  If there's any way to beef up the amount of signal getting to the cable box try it. 

Experience has shown that with this relatively new mode of transmission, audio levels can be quite dynamic. If your set provides it, you may try turning on "Audio Compress" or whatever the name might be. Could also be called Dynamic audio also or some such. Reason for all the hubbub is that along with HD, mixing engineers are also providing the most range for the audio dynamics as well the most video composition info in the new broadcasts...Accordianman.