Black screen Bios

Hi!

I recently got a Dell precision m4800 Running Windows 7.

Everything works great and Windows 7 runs smoothly.

But the problem Is when i start my laptop the Dell logo doesn't appear.

I can open the one-time boot menu and i tried to open the bios, but i end up with a black screen.

I tried to connect the laptop to my tv with vga, and tested if I could open the bios like that.

Strangly enough it opens the bios on my laptop screen and not on the tv...

I already tried to update my Bios, but that didn't work.

Hopefully Someone can find a solution!