when I turned my xecuter 3 on with the dvd player and Hdd a wierd thing happend. It turned on (for 3 seconds) then off twice by itself and then the xbox led thingie started blinking red and green. No screen came up on the xbox. It's like the xbox couldn't get enough power to boot or sumthing...
This is called a frag and can be caused by a few different things. Usually a faulty install. Visit the xecuter forum and have a search on Frag you will find a wealth of info.