Cannot install windows 7 using boot camp because screen turns off?

I have a late 2008 Macboook Pro 15 inch

Processor 2.4 GHz Intel Core 2 Duo

Memory 4 GB 1067 MHz DDR3

Graphics NVIDIA GeForce 9400M 256 MB

Software OS X 10.9

After partition is complete through boot camp my mac restarts to instal Windows 7

The disk can be heard booting up but my screen is turned off.

After a min or so the keyboard goes active but screen remains off.

The disk is a store bought copy of windows 7

I have tried different installers and the same thing occurs the screen just turns off. You can hear the computer running but cannot see anything or do anything.

Have to hold down the power button to restart.

I tried booting it through a bootable usb same thing occurs.

Tried dowloadin drivers and putting them on MBRFAT usb like recomended for iMacs with a similar porblem. That Failed too.

Tried connecting a different monitor it didnt work.

So I am stumped has anyone had this problem. Not the black screen the screen being tuned off.

Ive been searching for days and havent found an answer realting to MBP.