Hey guys, so I got a dreamcast for my birthday and it is great! I am a bit worried about something though, when playing games I can hear the console making sort of like a chugging noise. It is only at random times but it worries me that it's scratching my discs. I know it's probably just reading them but I need to make sure. Also, when turning off the console I usually just go to the games menu and hit the power button until I learned you can go to the menu by pressing all the face buttons and start, is the first way I did it potentially harmful? If so, will it effect anything if I only did it like 3 times?

Thanks!