Frozen blurred screen on Macbook Pro 15"

My daughter has my old Macbook Pro 15" computer. I went to a new unit when it was unable to be updated to a newer version of the OS. If my memory serves correctly it is running Snow Leopard.
In any case, her daughter put a DVD in to watch and it started up fine but in a few moments the screen froze with s blurred or streaked image which is frozen even after restarting many times and taking the battery out and replacing it and then restarting. The pixels never change.
My guess is the video card,or processor, is toast but would like to hear any other opinions. Also, if it is the video processor, is it worth repairing or is a new computer going to be her Christmas present?
thanks to all,
bill

Try to boot the computer from your Snow Leopard DVD. Is the problem still present? If so, then there's a hardware problem. Not knowing the problem I can't tell you if it is worth repairing. But I can tell you that the GPU is soldered to the motherboard and is not replaceable. The entire motherboard would have to be replaced.

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