What was the last thing you did before you noticed you can't turn on the receiver?
First check if the power cable is connected or there is power from the mains. And if you remove all the interconnects and speaker cables to it and it still won't turn on, I'd suspect a blown fuse inside the receiver. Or it could be something more serious than a mere tip you can do on your own. I which case, you may have to bring it to the service center.