You have three options to choose from if you want your Xbox 360 fixed with the three flashing red lights problem. First is to send your unit to Microsoft, they will repair the three flashing red lights error for free or have it replaced if you are still under warranty. It will take several weeks though, before you receive your unit. If your warranty is already expired, it will cost you around a hundred bucks to have it repaired in their service center. A cheaper way to fix the three flashing red lights of your Xbox 360 is to repair it yourself. You just need the proper tools to get your unit up and running in no time.