Hi,
I am hoping the wealth of knowledge here can help diagnose my problem.
I have an early 2008 MBP (A1260/Penryn) that largely has been trouble free. However, during the weekend prior, my screen went black. Specificially, MBP continued to operate, but the screen itself was black, with only the LED backlight illuminating. Using a MBA and a lot of trial and error, with iChat I was able to share screens and access the MBP--which confirmed that it still was working, just without the screen. I quickly updated my Time Machine backup shut the MBP down.
After reading about the NVIDIA failures, I took the MBP to my local Apple store, figuring mine was the next to have this happen. Unfortunately for me, the young fellow behind the Genius Bar told me that the NVIDIA graphics card was operating correctly. He ran a test using an external hard drive, and it passed each time. He then plugged into the display port an older Apple display, and after mirroring screens, showed me my desktop. When I asked him what then was the cause, he told me that, although not as common as other problems, the displays do fail and that I should have my LCD replaced. He said that for $400 (+/-), the MBP would be sent to a service center with which Apple has contracted and I would have the MBP within a week to ten days. I am quite technogically inclined, and since the MBP is out of warranty (AppleCare extended ended in June 2011), I figured I would see what my other options were.
After reviewing a service manual as well as a handful of repair guides online, I determined that I could replace the LCD with only a little effort. So, as of right now, I have an LCD on order. Of course, only after the order did I read this discussion thread. And further of course, even if I don't open the LCD, there is a restocking fee if I need to return it.
All of this being said, does my issue run closer to an LCD failure--since the MBP functions and it runs off an external display--or does my issue seem to be the beginning of a logic board failure?
Any and all help is appreciated. I really, really like my MBP, and hate to think that this could be the end of it.