LCD display on the dark, and then turn off the display switch, re opened, but also show that it is dark
The circuit of the screen is out of order. Fix the screen and go. The switch on the screen is useless. The internal circuit problem.
Display power protection and repair.
The high tension bar is broken. Replace a matching more than 20 dollar bill
Screen light on the dark, that is, short-circuit phenomenon, the machine self-protection, to eliminate short phenomenon to normal use.This kind of failure is usually part of the power problem, if you have your own ability, can open the machine to check the circuit board, the power supply should be part of a capacitor bulge leakage, then the pressure plate is damaged or short tube to burn out, to see if the capacitor bulge, related to the capacitor should be replaced. For ordinary people, only the visual fault self repair, if it is to change the pressure plate or tube for master repair, high-pressure plate lamp cost about 15 yuan, also a few dollars, see how much you accept master wages.In addition to show is the flash of a dark, just before the tube is not bright dark, you can connect the computer into the normal display open system, invisible image also never mind, listen to voice can know already in the system, then find some light flashlight, sticking to the screen look carefully, you will there are in fact found image display, backlight lamp does not light but you can't see it, with a flashlight light can vaguely see the imageIn this way, we can judge the backlight problem and show that the part is normal. The backlight is composed of three parts, the power supply, the high voltage board and the lamp tube.
