Has it been overheated? like left on a soft surface overnight?
have you changed the setting before it did that? you can actually disable the screen on a laptop by accident. I will be right back. I am gonna try to find more info.
have you tried using an external monitor? you can use a vga connector or hdmi if it has one with an hd flat screen. If it does right click the desktop then choose personalize then go to mobility setting. Then see the setting on external display.
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no indication of over heating, i can hear the fans working. already tried removing the battery and turning on the computer using the ac adapter and vice versa. still the same thing. monitor is still off.
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