This is a dangerous project, if you have to ask, I would not try it. Very high voltages are present even when the set is unplugged.
A television having color rings on the screen could be from a couple issues. There could be an internal fault with the CRT or a failed degaussing coil.
it is because of the rays produced by CRT
A CRT is a Cathode Ray Tube. CRT's are found inside televisions, ATMs, diagnostic and medical equipment and older computer monitors.
his depends on what type of monitor you are using. If it is a CRT (the big long old one) or a LCD (newer flat screen). If it is a CRT, then the monitor is going bad, and you need to replace it. If it is an LCD, then it is probably just a color setting.
LCD, LED, Plasma, OLED, all forms of television.
monochromatic means it can display only one color except black.Each pixel in Monochromatic crt contain a phosphor dot of one color whereas in color CRT the phosphor dot in each pixel contains three colors Red, green, blue(RGB).
crt tv
It probably means that you need to adjust the color and tint controls. Otherwise, you have an electronic problem that is preventing the red and blue electron guns from working, assuming an older television. In a CRT television, the CRT could be shorted out internally, or there could be problems on the circuit board plugging directly into the picture tube.
An LED TV is a television that uses light emitting diodes to create light and colors on the screen. Within the LED television screen are very small collections of electrical diodes that can turn red, green, or blue, and can increase or decrease in brightness depending on the current that is applied. From a distance, these diodes combine to create a range of full colors. LEDs require far less electricity than CRT monitors and emit less radiation. Unlike a CRT television, some LEDs change color when viewed from an angle.
An LCD television will only display high definition picture if an HD equipment is used as an input to it. Standing on its own, compared to a CRT television, modern LCD TVs have quicker reponse times and never suffer from flickering images. Both types of monitors (newer models) provide bright and vibrant color display. However, LCDs cannot display the maximum color range that a CRT can. In terms of image sharpness, when an LCD is running at its native resolution the picture quality is perfectly sharp. On a CRT the sharpness of the picture can be blemished by soft edges or a flawed focus. Also, a CRT TV can be viewed from almost any angle, but with an LCD this is often a problem.
CRT style televisions use an electromagnet, called the "Yoke", on the neck of the CRT in order to deflect the electron beam.
CRT screens don't have a port for you to plug in a HDMI cable.