RCA Big Screen Television

l suspect power supply board has failed---someone would have to open and check all voltage going in and out of the board----if outs are missing (any) the board would have to be replaced.

If you get it open examine the filter caps on the power supply board to see if any are puffed up on top---the tops are silver and should be perfectly flat with no brown material leaking out at top or bottom.

I suspect based on description a component (likely a big IC) failed and they are usually covered with a metal heat sink (plate) so cannot be actually seen---they pop and dead set.
Typical filter cap (capacitor)

RCA projection TV was working great and then suddenly would no longer turn on like there was no power to the unit.

There will be a fault in either the Y or Z sustain boards, these are responsible for driving the screen 9hence sound but no picture). The popping sound willhave either been a fuse blowing on the board or another possibility is one of the drive ICs on the buffer board has blown. If so it's best to replace the board.

Chances are something in the power supply board failed and that was the pop you heard, a new board should get ti going again

if you heard a hissing or like static sound your board probably has a hole in it now. the board on the left side with the flyback fransformer. the hole is from where a prong has come loose an is arking over an it burns the board the ark is the sound you heard.

Pop sound is probably the Lamp or maybe the color wheel. When you unplug and try it on do you hear a whirling or winning sound ? Is it followed by a slight ticking sound ? If you get the whirling and a ticking sound it's probably a bad lamp. If you don't hear the whirling sound you may have a bad color wheel. The parts are both made of glass. The pop you heard was one of them breaking. If you can't tell, order a lamp you will need to change it eventually anyway.

just might be the bulb. Have you unpluged you set make sure its cooled down and remove the buld examine the bulb ussally when the bulbs go bad they shatter not always but it good to check them out as the first step

Hi this is Matt, some units have fans in the back, if you can open it and look in the back, also make sure its free of dust in the back, this can be from overheating, also bad solder joints on the power to the lights in the screen, can be this, you may need to replace the board, feel free to get back to me

#1 When I turn on the TV the power button comes on then blinks 6 times then goes off for a few seconds then repeats the cycle. I have sound over my surround system during this time but no picture.
#2 My sound would crackle and pop every once and a while until now it does nothing. I have to watch it with the surround sound on.

yes it can still be fixed! the pop sound you've heard maybe came from a blown capacitor in the vertical deflection circuits. this symptom, sometimes called the tube light effect, it is characterised by a bright thin horizontal line across the middle of the screen. this symptom is caused by a breakdown in the vertical deflection circuit. hence maybe the trouble maybe in the vertical oscillator, amplifier or output circuits. but if all i have said is not clear to you, better bring it to a qualified tv technician. good luck!