If your console had to be sent in to be repaired, and you received it back only to find a new console then you've probably faced some of the challenges regarding the Xbox 360's licensing system. As it stands you need to have purchased the content you want to use on the console you're using the content on if you would like to use it without being signed in, otherwise you need the Xbox Live account that purchased the content to be signed in on the console in order to play the content.
Well recently the folks over at Microsoft modified the licensing so you can actually aquire the licenses to use the content on the console you received back from repair without being signed in. From Xbox.com's support site:
- Attach your hard drive or memory unit.
- Turn on the console.
- Sign in to Xbox LIVE with the gamer profile that originally downloaded the content.
- Go to Xbox LIVE Marketplace and select Account Management, Download History.
- Select an item and then select Download Again.
- Repeat step 5 for each item in your download history.
Although it sucks to have to redownload every single item you want to use, if you already have the content on your storage device it seems to just download whatever license is necessary to play the content offline that way your download queue doesn't fill up to the limit forcing you to wait until one item is download before you can start another.
Enjoy!