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i have this laptop and (where do i look to see exact model number?) it's screen has given me problems since I've bought it. it shows horizontal white lines across the screen when i tilt it or when its in an angle it doesn't like, its pretty temperamental. i bought it through best buy and have sent it off to their geek city to have this issue solved twice and possibly three times now should someone on here now know the problem/solution, the first time they replaced the inverter cable, and the second time they replaced the whole mobo.The only issue with the screen is these horizontal white lines, i was looking at a few similar posts and saw people with horizontal AND vertical, and/or white AND colored lines, mine are just white and just horizontal. where the white lines are not during one of these episodes the screen displays normally, but the lines do flicker.
This is the first laptop I've bought, MAJOR TURN OFF! Please help! 
EDIT:forgot to mention that this problem does get progressively worse over time, each time after i get it back all seems well until a week or two later then it starts all over again.
