It must be sad, My brother just suffered that same offence on his Xbox 360, He still has it, He needs repairs, He is earning like $350, Just to fix the famous, "Three Red Rings." By Microsoft, We were trying to fix it at Bestbuy, but the problem was not the Plug, It was inside the system, He want's to return it to Bestbuy and get a new Xbox, He still has the Warrenty, He doesn't want to return it to Bestbuy, So He is trying to earn enough money to send it to Microsoft to repair it them selves.
5 times? Woah, That must really sucks. My Cousin had it for 10 times, he had it sense Xbox 360 came back. Well, Good luck finding a way to repair it.