My 61 inch RCA Scenium, currently has sound but no picture appear

The light engine should troubleshoot. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

RCA Scenium Profiles HD61 TV IT'S AT 480i how I get at 1080i or 720i please help....thanks...

Change the Lamp.

turn tv of by power point for 1 hour then switch back on that resets the picture if still happens may need a service

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.

The color wheel isn't spinning.

Sounds like a cold solder joint in the power supply or faulty capacitors.

unplug both the TV and the cable box for 2 minutes then replug them in. this will reset the micros in both units. if there is still no sound check your SAP setting make sure its off.

I HAVE A RCA 50 HDTV DLP MODEL #D50LPW134 IT MAKE A BUZZING SOUND AND NO PICTURE i CHANGE THE BULB AND STILL NOT WORKING.

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Ken