Don't post in all caps. Does the computer seem like it is booting up, i.e. fans going, hard drive making noise, etc...?
I thought that this was well known, but the underfill that NVidia chose to use on their GPUs was not ideal, and eventually cause the black screen of "death". I was able to remedy the problem by "reflowing" the solder, by taking laptop apart and heating up GPU; but, since the problem is the manufacturing of the GPU, the thermal expansion wihch is supposed to be held in check by the underfill, causes the issue to come back-sometimes after a one heat cycle, sometimes quicker. Therefore, you can stil use your computer if you have an external monitor, but otherwise, we now own a very expensive paper weight... I believe there is a class action lawsuit, but who knows if we will ever get justice!