MacBook Pro horizontal lines on display through Apple logo, won't boot
I am trying to fix a MacBook Pro 15" A1286 that suddenly started having the following problem: when powered on, there are immediately disjointed horizontal lines on the display. You can see the Apple logo and the spinning boot wheel, but the lines go through those as well. After the wheel spins, the screen turns blank white and it doesn't seem to finish booting. I can boot into target disk mode, and the lines still appear. I can't get it to boot into Apple Hardware Test. I'm thinking about taking a chance ordering a replacement part, but do you think it is the display or the graphics adapter (or something else) that is broken?
Here are two photos of the problem:
Is this a good question?