Rca tv screen gone red

LG LCD TV REPAIR - NO PICTURE SCREEN FIX REVIEW ...

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www.youtube.com/watch?v=PWoz_-3OHIMJan 25, 2013 - Uploaded by Tampatec I have a LG 42PM4700-UB plasma tv that just went black. The red power .... I have a RCA 32 inch it has no sound or picture !Just a light blue ...

Is this a projection/plasma/CRT?

Only the older Analog type televisions get snow from lack of signal. The modern Digital TV gets pixilated. like missing pieces.
And on re-reading the title of your question, it does say CRT...... As in Cathode Ray Tube. (I thought they were all gone now, all around the world) Anyhow.... has your country switched off it's analog tv transmissions. This would give you snow. Because there is no Transmission. Seems unlikely they would stop transmission in the middle of what your watching.
So
Do you have a Digital Set Top Box feeding the TV? This would pick up Digital TV transmissions and convert them to your old CRT TV Screen. Knowing this should help you diagnose the problem.
Check the antenna input to your digital box and connections from the STB to your TV. They probably use a Yellow video cable and a Red & White (Sound Left & Right). You didn't mention if sound was still there?
Perhaps someone has pressed the remote control and the TV has jumped to one of the Antenna Channel inputs rather than the Video input (Yellow Video input)?
Might be that Simple.....
Good Luck

Bad picture tube

The red gun in the picture tube itself is shorted on. You will have to replace the picture tube itself to fix the problem. Probably want to just buy a new set. Sorry!

do you have and big sound system if you do the move them away from youur tv. or you sould just bring it to a shop it must be the picture tube

I had a television that went to a bright shade of blue.A friends neighbor worked for sony television plant where the new tubes came down the assembly line.His job was to make sure tubes were working fine,if one color was dominant then his job was to smack the front center of the tube with a rubber mallot to fix the problem.He suggested i try that with my tube while the set was on.It worked and solved my blue problem.Apparently he explained,the gun connections in the tube came loose and to fix it was to smack it this caused the connection to reweld itself.For you I would use the palm of an open hand and smack the tube dead center with a good hard smack.Dont be afraid of breaking the glass because its very thick and strong.Give this a try.Hope it helps.Good luck!

it is not the tube. There are three components that control red, green, blue. You will need to get it serviced

This is not the tube, it's most likely the colour controller and system function ic has gotten scrambled, taking this to a tech to re program should not cost more than about $150 AU

Sounds to me like a bad picture tube with circle rainbow like colors.Good luck.