I have an Asus x551m and I'm having the same issue. The power button flashes then I hear a beep but the screen doesn't turn on. I've taken the battery out held down the power button then tried plugging the power cord in (with the battery still out) then held the power button down for 30 secs and when I let go the power button still flashes and I hear a sound followed by a beep. The sound appears to be coming from the disc drive is what I'm guessing. I hear a sound like it's trying to work but then I hear the beep. Please help.