If you need more info about your Xbox 360 console, visit the Xbox forums. Three flashing red lights mean that the Xbox 360 console or its power supply has a hardware problem. To find out whether the problem is with your console or the Xbox 360 power supply, try these solutions. Did this resolve the issue?

With Game Pass Ultimate or Game Pass Standard, you can still redeem codes for other subscriptions that are included as benefits of your current subscription. These codes will automatically convert to your existing subscription at a ratio based on the following tables. Conversion ratios are subject to change. Did this resolve the issue?