A guide to remove the Top Cover of the Sega Dreamcast.
Flip the console over on its back.
Take note of your model number, in case replacement parts are needed.
Remove the expansion bay by applying pressure to the small clip on the expansion bay while prying it away from the console.
Locate and remove all four black 12mm Phillips #02 screws from the underside of the console.
Turn the console right side up.
Remove the top cover by gently lifting the upper portion of the console.