Here is a iMac/Hack I threw together back in 2007.











I reused the apple speakers, amplified them. Used the LED from the Audio Amplifier as the power on light.

Used a tough fiber/elastic string to allow flipping the mac open, and it would remain open like the hood of a car, or a cab-over semi

The 2 Sound out headphone jack holes, each hole has a button micro switch. one is Audio Amp on/of, one was Computer Power on/off.