Toshiba Satellite won't boot up

Hello,
I have a Toshiba Satellite and it won't turn on. I have ruled out the blackout screen where you pull the battery and the plug it in and turn it on but it's not that. I have also ruled out hdd failure.
So what happens when i it boot up.... I push the power button the fans turn on and then I hear a noise, kinda high pitch. And then nothing, black screen no boot up. It sounds like an electric failure. The Sound comes from above where the hdd drive is installed. I have taken the hdd out and the sound is still there. Any ideas what it might be. I was using the comp one sec and the next it was doing this.
Thanks guys