Anyone know what could be causing this fault. The laptop works fine except the screen is just black until the windows login screen. If I connect it to an external screen you can see all the boot up. I've checked the bios but there doesn't seem to be an option to change. The backlight comes on from the start it just won't show anything until windows actually boots. Other times as well it will display random funky colours that kinda look like the screen has been cracked and the colours run??? It did only seem to start happening around the time I changed the invertor. Is there anyway this is related to that or a loose connection even though this fault is purely pre windows booting?