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液晶彩电背光灯损坏的主要表现为无光线发出。当液晶屏上有淡淡的图像显示时,则说明背光灯相关电路(升压线圈内部短路或断路)有问题。若背光灯电路完好,则说明显示电路部分存在故障,通常可以从液晶屏后面观察到有明亮的白光发出。检查时,首先通电,再观察是否出现上述现象。若出现上述现象,则观察液晶彩电电源指示灯是否亮绿色,若亮绿色,且LCD屏只有淡淡的图像显示,则说明背光灯已老化,需换用新的背光灯。提示帖:以上检查需要以高压电路正常工作为前提。
LCD TV backlight damage is the main performance of no light emitted. When the LCD screen has a faint image display, then the backlight circuit (boost short circuit or open circuit) there is a problem. If the backlight circuit is intact, then the display circuit part of the fault, usually from the back of the LCD screen to observe the bright white light emitted. Check, the first power, and then observe whether the above phenomenon. If the above phenomenon, then observe the LCD TV power indicator light green, if the light green, and the LCD screen only a faint image, then the backlight has been aging, need to switch to a new backlight. Tip posts: The above inspection needs high-voltage circuit to work as a prerequisite.