|Might be a hardware problem like the inverter. Before rushing off to buy parts I suggest your eliminate any software issues. I think laptops have keystrokes to turn off the integrated screen. Check your manual. |
Try booting into Safe mode (F8 at start up).
I found one thread by Googling "laptop display stays black when booting" without the quotes that said the problem only happened with the screen opened less than 90 degrees. Lots of hits when Gooling that phrase.