Just to clarify, the pc does turn on and all of the fans are running properly as well as the components, youre just getting no signal on your monitor/televison?
If so, since you are using a television, make sure you have the tv switched to the proper input. Since youre using an HDMI, make sure that your tv is switched to the correct HDMI input (i.e. you plug the HDMI from the pc to HDMI 2 on tv, turn the tv input to HDMI 2). They need to match. If the tv isnt switched to the correct input, you wont get any signal at all unless something else is plugged into that input.