Tv has bright green color

your Samsung TV is experiencing issues such as sound but no picture, you can reset it by unplugging it and holding the power button for 30 seconds. If you're having issues turning your TV on, you may need to unplug it for 30 seconds and plug it directly into an outlet that you know works properly. You can also try pressing and holding the power button on your remote until the TV turns off and on again. If the issue persists, please contact Samsung Support for further assistance. REFERENCES:
https://www.samsung.com/ca/support/model/HPS4253X/XAC/

It is most important when inquiring on this site to please include a model number and make of the product that you are asking about.
There are so many thousand of TV types out there that a general question like your just can not be answered without more information from you.

when the color wheel stops the picture will be all over the place. and you will have lines when it starts to fail as its not going fast enough for the picture. wining sound is it wearing out.

color wheel

Maybe your color wheel breaking up, if hit goes no picture or might be the lamp. If color wheel you can see it if you remove the back panel (UNPLUG TV FIRST) it's next to the lamp. Color wheel cost
Appox. $100 & If Blub Cost $75-$100 both can be bought online. Shop by you model #. If not sure what your doing call TV service Tech.

Good Luck!

Ur colors wheel is dead,must call tech.for this is very difficult to take out,and replaced have no tv tech. experience.Best to call tv shop service,to replaced this colors wheel,and have warrenty on it.

This TV is horrible. I have the same one and not even a year replaced the light bulb twice. Very disappointing for a Samsung.

its sounds more like the digital board that needs to be replaced

No It is not the picture tube.
First, I would suspect a bad solder connection (cold solder connection) to find this problem hit the side cassing to see if the picuture goes away or comes back.
Another way is take the back cover off and tap gently on the boards with something not conductive or your hair would look like mine. The most commond section is power supply and neer the Horizontal flyback transformor.
The horizontal transformor look at it, it's a big greyish darty little thing about 3" x 4" and stand up about 4" with a big red wire going out of it. Don't touch it, it has very high voltages, just look what it done to my hair I'm telling you don't touch it along with it's red lead's. Just look to see if it is arking if so replace it.

When you have convegence problem , it is mis aligment of the colours in the genmentry aligments.
I would suspect more in the power supply section.

Regards

What about Bob
Timmins, Ontario
Home of Shania Twain.

sound like coldsold... call your tv tech. for help