I have a 60 something inch RCA Scenium Big Screen TV we have had it I think for about 3 years. It has now decided to turn its self off then back on several times when it has been on for a long period of time. What could this be?
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Are you using RCA type audio cables?, if so, make sure the connectors are tight and the cables are not frayed, it also helps routing those analog cables at least 8 inches away from any power cords or transformers. Buzzing usually is caused by loose ground connections or RF interference.
Try unplugging it for about 30-60 seconds, then plug it back in and before you turn it on, make sure there is a good video source going to the TV either from Satellite/Cable or a DVD player or something.
If this doesn't work, try unplugging it a bit longer and then plug it back in and try again. If it still does not work, you may have to take it in and get it serviced.
Usually when devices power themselves off like that, there's something wrong...
this happened to me with my RCA Sceium 52 inch floor model, for 2 years before I figured out it was
over heating. Of course I had no money to fix problem. What I did is simply put a cool fan on back
or AC. Even rolling in front of a sliding glass door when its cool out will work well. Cold air on back
will stop it from turning off.
Yes, the lamp will gradually get darker as it nears it's end. The rolling lines sounds more like the set is on a local channel for the cable hook up. If your local area has a channel 3 or 4 live terestrial broadcast simply tune the cable box output to the other one, the same for the tv. If this is cable/local broadcast issue it will go away in Febuary when the NTSC broadcast ends.