Screen shows 2 white and 1 black column

As I turn on a friends MacBook pro, I get 3 columns, 2 white and 1 black, and little squares in each column the opposite colour. That's all I get, the boot up sound and that screen.
Does anyone know how to rectify this? I'm not sure what version of is he has. Could I back up his hard drives data?

If you can connect the MBP to a monitor and it works, then it is the GPU that is faulty.  If there is no change, then probably the display or the display connection is faulty.
You could probably get the data off by using Target Disk mode if you have access to another Mac:
http://support.apple.com/kb/ht1661
You should make an appointment at an Apple store genius bar for a FREE evaluation.
Ciao.

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