My xbox 360 has 3 flashing red lights, I went onto the Microsoft website and did the questionnaire thing. They said I needed a new power supply? I thought I would try a friends power supply and see if it works (Which it didn't) So I went through the process to send it back and it said the total amount (to pay) is $135.00 and they will inspect it then exchange it for a refurbished one? Do I have to pay any extra charges? It has no warranty.