Television and Home Theater

I hope someone can tell something?:( I have a 35" TOSHIBA (CX35D80) TV, I came home the other day & turn the TV on & the sound worked but the screen had a white line going across it I first thought it may be the picture tube!!, but my friend said it my be something esle because he said if it was the picture tube you probably wouldn't see nothing. So I was wondering if I should get it repaired or just get another TV please tell me something THANKS

I have a JVC big tv and in all 4 corners of the screen I have a little triangle with a color in it.There is blue in one corner,yellow in another,green and red.They stay there when you watch something on all channels.I don't think the colors in the corners should be there.Even when there is no picture they are there.

I have a big screen TV that doesn't project the blue to the screen. We have looked in the TV and the CRT's are all bright. The blue just doesn't seem to project to the screen. Any suggestions on what we could do? I don't know if there are lenses that have to be replaced. Nothing is leaking and all looks fine just no blue on the picture.