Computer monitor all of a sudden the dark, light normal

With a display with a light decline, the last full dark, normal light, then put the computer in the film, the film also displays after dark to play, after the resumption of the display is dark, still sounds normal ………Is not a bad display it, earlier in the afternoon thunder, lightning, I have a room, and do not know that there is nothing to do with

to repair it, and CRT is a problem, if there is no knowledge that he can not fix it! Or bad, will not be the general picture tube, which is not a resistor or capacitor.Have to understand, buy a few dollars on the line things changed, then you will not get special display stores, general or so dollars to get .Normal light, high pressure may be normal, you can adjust the display's brightness button to see whether it can transfer light.If you can see the map, only the dark, may be part of the high pressure caused by negative pressure is too high, this part of the circuit May be a problem.If the frequency and to protect the circuit, then the action is light yellow instead of green, open display when you can hear the “sand” and say there is a high-pressure.But you repair it, your display General bad thunder and lightning does not matter, otherwise, your host has Pao Bule.And may have been your first machine you debug display of the degaussing umbrella because of thunder there is lightning may interfere with the magnetic field was no problem.If the liquid crystal display, there are two possibilities, is a high-pressure fire board, and another is a bad motherboard, you are 200 maintenance, should be high-pressure plate that is bad, display of brand maintenance cost is expensive, if it is non-brand-name Display, another high-pressure board will be dozens of yuan, it is estimated that the board is a high-voltage capacitor problem, if you own amendments, the capacitor can be the same as another, it costs a few cents! ! !