What does the vertical pink or purple checkered lines mean?
my macbook pro A1261 ser#W88112B1YP4 has these weird lines and won't fully boot up. I was wondering if this was graphics card or logic board just happened about 3 months ago
Your machine has the GeForce 8600M GT GPU which is the exact one that nVidia had to pay for in the class action law suit. Apple lied or the tech did not know his stuff. Apple should repair this for free. If they don't please come back and will direct you to the precedent set by a small claims court. Also their own web site: http://support.apple.com/kb/TS2377
You most likely have a failing graphics card on your MacBook Pro. These models are known for having a graphics card failures which can cause graphical artifacts and booting problems. Your best bet is to take it into the Apple store and have them determine if it is still covered under the Nvidia recall. If it is within 4 years of the purchase date then Apple will replace it free of charge.
Hope this helps.