dont send anything but the xbox! take out the hard drive all memory cards wireless and all wires before you send it back if you send anything else to microsoft they will not send it back they only send you back an xbox without a hard drive and a month of free xbox live no matter what you send them.
no just the system by itself
my boyfriend just sent his off. he included the power cables. they fixed his xbox and had it shipped back in about a week, week and a half. they did not ship back the power cable for two to three weeks AFTER they returned the actual console. so i would advise not shipping the cable!