just bought off ebay nd love it. paid 400 for it. 2009 macbook pro 15 inch unibody 3.06ghz core 2 4gb ram 3200gb hdd got it so cheap because it needs a battery and there are 2 vertical lines on the screen, and he said the screen flickered. well got it today and love it, but the issue is the flickering isnt really flickering, the screen will go out like it was shut off, and if i give the macbook a bend from one corner to another, it stops acting dumb... the tricky part is when its on the dedicated card there are no issues at all... So is it a bad logic board? short in the igpu? what could it be?