Macbook a1342 acting up, black screen but extenal display works...

Hello,
I am a new member to this community and I'm already getting a headache from my macbook. So my mac has been working flawlessly for the past 2 weeks or so ( Macbook A1342 Late 2009 w/ OSX Lion). I have SMCfan control and istat pro to keep an eye on temps and to stay ahead of the heatsoak game. I did a "deep discharge" of the battery then waited a few hours to plug it back in and when i did and let it charge up, I then proceded to turn it on and do some light surfing if any, mostly idle though. While i was doing that i noticed that the temps were starting to soar up to 80-94 degrees C. I turned up the fans to full throttle to get it cool and it cooled it down to say 60-70's. Okay, now afterwards, I rebooted the mac and then it started giving me more issues as in no display, but I do hear the chime and it seems to boot as normal just no display. I plugged in my mini dvi to hdmi connector to a tv and BOOM, the screen popped right up on the TV like it was supposed to; at this time i became very confused. Now i know that the macbook camera and LVDS cord are connected together so while it was still connected to the external display i attempted to turn on the camera with Facetime and it said camera was not detected!!?? So I'm not sure what the issue is, I am currently deployed to an undisclosed location in SW Asia for a while so I am unable to go to any repair store. I consider myself very technically inclined so repairing this would not be an issue within reason of course. Is it the logic board, if it were it wouldn't start up right?? Is it the LVDS cable, I popped off the back of the mac and looked at the connector and it seems fine, i unplugged it then plugged it back in and no change. When it was connected to the external display, it seemed to be running flawlessly...I was unable to see any problems on the screen, but like i said nothing came up on the mac screen and no camera was found, no green light came on either. Please help...I really need this thing back up and running, and I apologize for the long first post.
Thanks!
Matt

if an external monitor through the Mini display is working then there isn't a GPU issue id recommend checking the LVDS connector on the logic board make sure it isn't damaged if its damaged then id recommend un-soldiering it and re-soldering a new LVDS connector to the logic board also another thing to check is the LVDS ribbon cable itself make sure it isn't torn anywhere also try another LCD screen also

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