Calling all laptop computer techs

This is gonna sound kinda crazy, but sometimes if you have a major issue like this, it's due to poor quality of soldering holding the board together. You can try dismantling it, remove all the cables, then put the motherboard on a cookie sheet and pop it in the oven to try and reflow the solder and MAYBE bring it back to life. Just a thought. I've heard of people doing this with video cards, and even the Xbox 360.