彩电有图像、有伴音,但屏幕上出现极少见到的特殊字符(非预设字符);或者彩电无光栅、无图像、无伴音,各功能键不起作用,屏幕上也出现特殊字符。总结之,彩电大致有12种特殊字符显示。下面介绍彩电出现特殊字符显示的故障原因、解除措施与快修方法。1.彩电屏幕上的光栅中部出现特殊字符——红色“M”大写字母故障原因:(1)新换的 CPU 尾号与原 CPU 的尾号 Color TV images, sound, but rarely seen on the screen special characters (non-default characters); or TV without raster, no images, no sound, the function keys do not work, there are special characters on the screen. In conclusion, color TV roughly 12 kinds of special characters display. The following describes the color TV special characters appear the cause of the malfunction, lifting measures and quick repair methods. 1. The color grating on the screen special characters appear in the middle - red “M ” capital letters Cause of failure: (1) the new CPU tail number and the tail number of the original CPU