So yesterday my lenovo y480 laptop screen stopped working. However if I hook it up by vga to an external monitor it displays on the monitor but the laptop screen ALSO works. But as soon as I unplug the external monitor the laptop screen turns off again.
If I extend the monitor the laptop screen turns off. PC screen only it stays off. But set to duplicate it stays on.
So I know the screen works. But how do i get it to stay working without the external monitor?
No, I don't believe so. It doesn't appear stuck. Plus it would need both function and f4 at the same time being stuck.
I have noticed that function F2 turns the back light off which turns the whole screen off. But without the external monitor plugged in the screen just flashes but stays black. With the external plugged in it turns the screen on and off.