please help. ive got an x box 360 off a friend and he says its been flashed. this is my first xbox. the problem i have is i need to turn the xbox on for aprox 5 mins before i can play my backed up games. it plays the orignals ok, but it wont play the back ups ( which i perfere to play as games are so expencive and i dont wish to damage the disks) till after 5 mins on. the dash board loads up ok. hope some one can help?