The solution to the white screen of LCD display:
Question: It works at first, sometimes there will be waves, and it is not clear after a while, and then the screen becomes blank! If you don’t connect the signal line, you can’t see it showing the words no signal! You can only see a blank screen if you have a signal! See nothing! When the monitor is powered on, it will show no signal, and then there will be a white screen! What is the problem? The screen is broken? Still? Help?
Answer: There are three main reasons for the white screen:
1. The screen line falls off. When this happens, the display is always white.
2. The screen circuit board fuse is blown, and the response to the screen is always white;
3. The screen power supply When the conversion circuit fails, that is, the DC-DC circuit fails, sometimes there is a short display or no display and then the screen is blank.
From what you said, it should be the third type, which belongs to the failure of the screen, but it is a non-fatal failure. If the screen is always white, it will be broken (you can only change the screen); if the screen cable is loose (reconnect it, it will be OK); if it is a high-voltage board problem, (the high-voltage board interface is transferred and connected if it still does not work) and change it again.