When I was pressing on the button very fast, I was able to light up the screen but only for a fraction of a second. In my case the lid button worked properly, it didn’t stuck inside the case. The inverter board works as a power supply for the backlight lamp and if there is no power coming to the inverter board, the backlight lamp will not light up either.
If the lid close switch is dirty, it might get stuck inside the laptop case and cut off the power from the inverter board.
This button triggers the hibernation or sleep mode when the screen is closed. The lid switch is a small button located close to the LCD screen. If you have a similar problem, make sure the lid close witch moves freely. It means that the screen still gets data signal from the video card, but for some reason the backlight lamp doesn’t work.įrom my experience I know that this problem can be related the lid close switch, faulty inverter board or bad backlight lamp. The laptop screen still works but the image is very very dull, you barely can see it. After that I took a closer look at the laptop LCD and noticed that the screen is not completely black.
