Hi, I bought a MBP 17inch a couple of weeks ago. After checking, I found model number of my MBP LCD screen is 9c61. But model number should be 9c80, 9c81 or 9c83 for current MBP. What's happened? I purchased an older model MBP or not? Any idea? Also, 9c80,9c61 --->AUO 9c81--->LG 9c83--->Samsung correct or not?