What is the reason for the black screen of color TV?

Different from the monitor, the color TV screen is not displayed, which is not called "black screen", but generally called "no image, no grating". Also distinguish whether there is audio and whether the power indicator is on. For color TV, it is necessary to distinguish between CRT/LCD/LED/ plasma and rear projection. The same fault phenomenon is reflected in different kinds of TV sets, and the causes and parts of the fault are different. Even the same kind of TV has many reasons for "no image and no grating", which is not a good example. Tell a joke that everyone is familiar with, please don't mind: it's an electric fan from a distance, but it's an electric fan from a close look. Why don't you turn? A: Not an electric fan. No, just a fan. Answer: There is no electricity. No, it's charged. Asked why the electric fan didn't turn on, saying that the electric fan was broken. This is a typical joke, but after careful study, what is the reason why the electric fan is broken? There are too many problems: poor plug contact, open power cord, blown fuse, mechanical timer contact failure, electronic control board failure, motor lead open circuit, open starting capacitor or serious capacity shortage, motor starting coil burned open circuit, shaft and shaft sleeve rusted and locked, and the fan blade was resisted by hard objects. There are too many reasons why a simple electric fan doesn't turn. The circuit of color TV is much more complicated than that of electric fan, and there are more reasons for the failure of "no picture and no light". It is not difficult to solve this kind of fault, but it is necessary to have a specific model to judge the approximate fault range according to whether there is sound or not, and then make necessary inspections, so that it is not difficult to find out the fault location and eliminate the fault.