Why does my 52 rca tv keep turning itself off and making a hiss?

Unplug the tv, take off the back cover and feel the top of 3 capacitors. On my d52w20, CP150 (rated at 2200uf 16V) was blown and the top was bulged out. You should also check CP120 and CP114 to see if either are blown. I don't have a clear picture of where it's located, but I have a picture of what you should see after you take off the back cover.

http://i265.photobucket.com/albums/ii209/fillmore85welder/KodakMoment003-1.jpg

In the middle of the picture you see an aluminum heatsink in the shape of a 'C' with the opening facing away from you. That is where CP150 is located. CP120 and CP114 should be located nearby, but if you can feel a bulge on any of the tops of those 3 capacitors replacing them should fix your problem. Replace the existing capacitors with a higher voltage rating of either 25v or 35v.

"4 capacitors on the power/deflection board. CP110 220uf 200v. CP120 220uf 35 Volts. CP114 220uf 35 volts. CP150 2200 16 volt. also check entire delfection board for cold solder especially around flyback. bad connections here can cause problems like some of the fp fuses blowing and cutting off convergence supply"

the rca itc222 chasis is a rather problem child that has many common problems. the most common being the flyback transformer, the horixonatal output transistor, and some electrolytic capacitors. technicians have a device much like the computer for cars that read error codes of the processor. i believe ther around 25 different errors that can lead to a shutdown