I don't condone the Wal-Mart swap - that's fraud anyway, which is a felony. TJ - before paying someone else to fix it, I suggest searching for eBay for something called "X360 tool" or something like that, as well as "Xbox 360 SATA cable" and "Xbox 360 DVD-ROM power cable" (maybe not exactly those terms). You can use a hair dryer to take the warranty sticker off, then use the tool (there are many tutorials) to pry it open without leaving any marks. Swap the cables (don't take the drive out, just lift up the rear side) and see if that fixes it, if not, then you can go a few different directions, depending on which kind of drive is in your system (it's either a BenQ or a LiteOn).