Re: Do I have a screen inverter problem or backlight probelm?
Firstly, plug it into an external monitor to see if the laptop is actually sending any video signal. If that works, you can say it's a problem with the internal display arrangement. When you say 'Blank screen' - Do you mean a blank screen but lit-up, like obviously powered on but blank? Then it's more than likely not the backlight. If the screen stays looking like the laptop is turned off, completely lifeless - then it's a backlight issue. If it's not the backlight and the screen is not visibly damaged, it's about 9/10 chance of being an inverter issue.
EVGA SLI Micro Z68 // Intel i5-2500k @ 4.4GHz // 8GB Corsair Vengeance 1866MHz // Overclocked ASUS GTX 660 Ti // Corsair Carbide SPEC-03 // Kingston Hyper-X 120GB // 2TB WD Green + 500GB WD Black