I have to hold down the power button ( if i let go it just turns off), and the fans spin, and the led lights in the pc flicker, but there is no display. Im not sure if only the fans are getting power, and the rest of the pc is not....and im not sure why there is no display. I also have to hold down the power button the whole time for just the fans to spin but there is no display or anything else. what is the problem???

PLEASE HELP!!!!

THANKS!!!!!