High Def Forum
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Problem with LG TV and Cablevision

11-26-2010, 08:29 AM
I have a 20" LG TV (model 20LS7DC) hooked to a cablevision box through HDMI cable. The picture and sound do not sync. Have had cablevision look at it several times without any solution. Other sets work with that cable box so I think it's the TV. Have called LG and they claim they have no knowledge of a problems and there are no software upgrades for that model. Any ideas?

11-26-2010, 08:38 AM
It's cable. I get that intermittently on my LCDs and Plasma. Usually if I turn off the TV and box, then turn the TV then the box on, I can get it to clear up.

11-27-2010, 02:22 PM
Try unplugging power to both for 5 min and then boot them both up. My guess is the cable box needs this reboot. If not, have them replace the cable box.

11-28-2010, 09:39 AM
On my third cable box. Resetting the TV works for a while, from 20 to 60 minutes but then the it gets out of sync again.

11-28-2010, 12:59 PM
Then it sounds like it is likely to be a problem with the TV.