Sorry. I haven't been thorough with my description. The video card is fine as I have an external display connected. That is how I am able to go into safe mode, etc. When trying to swith the laptop display on (via display manager) the external screen refreshes but the laptop monitor is still shown as not activated. Like I said before, I'm convinced this is a bios or hardware issue.
How would I be able to diagnose which of the problems it is?: lcd, lcd cable or inverter.
There's no backlight so it could be the inverter, but there is also no dim picture on the screen. Can it be both at once? I'm thinking it might be some common cable between the both of them, if that exists? This is where my lack in experience with laptops makes things hard for me. I'm also not comfortable opening the whole thing up unless I'm pretty sure it's a cable issue.