I recently moved into a new apartment with my wife and my Xbox did not survive the move. While I don't believe the move or packing damaged the power supply, it still did not power up once it was set up in our new apartment. With the LED not even turning on by pressing it, I suspected the power supply. I ordered a new power supply from the iFixit website and followed the repair guide. As soon as I reassembled my Xbox, I powered it on and, to my excitement, it powered on and works!

This was an incredibly helpful and cost effective solution. Thank you for creating this helpful guide!