Alienware r17 igpu dead

[Playtastiv]

Hello Im new to forums in general so this might look a bit rough (also I'm from germany)

I have an alienware r17 something something (dunno the generation smarter people then me will know it instantly from the photo of the bottom I couldn't find anything)

And some part of the Igpu failed there is an dedicated GPU installed that works perfectly 

Now my problem is:

I can only start up the machine if I instantly close the lid after pressing the power button and then hooking it up to an external monitor the previous owner somehow did it to change the standard GPU in the bios I accidentally reset it and now it doesn't work normally anymore (it only works if I turn in on like mentioned above) so I can't use the laptop display without changing the setting does anyone know how i can change it or how to do the bios unlock so the option to change it is normally available in the bios thanks In advance 

If anyone wants to know it has an i7 4910mq + 32gb DDR3-L in it and a GTX 880m 

[PineyCreek]

Try connecting an external keyboard to it.  Shut the monitor as you had booted it before but start tapping F2 as soon as you power it on.  See if you can get into the BIOS and view/edit it on the external monitor.

[Playtastiv]

Already did that but the bios is a locked down version where I only can change user settings like webcam on/off wireless etc