Unable to order new PSU because I can't register my Xbox

I own a secondhand Xbox 360 slim that a friend sold to me. I encountered some problems that I've determined are most likely the Power Supply Unit and that it needs replacing. Following the myriad of links on the Xbox site, I found the link that (presumably)
leads to an area where I can order a new PSU - except that to order anything, I'm required to register the device. I get the error:

An error occurred. Please try again.

• Unable to register a device. Ineligible for registration.

I'm assuming this is because my Xbox was previously owned by my friend, and the site thinks I'm trying to register a device that has already been registered under another account. But, the problem is, I can't get in touch with this friend to see if she can
do anything, and I still am unable to order a PSU via Microsoft (as they like to suggest we do). I don't want to buy a PSU from a third party, since my experience in the past with buying things third party is less than great, but I'm not sure what to do, since
I'm simply unable to reach a place through Microsoft where I buy buy one of theirs.

Help? Suggestions? Anything? Am I SOL?

:)

 

Can i use Xbox 360 from Australia in USA

Hey there!

To order a new Xbox 360 Power Supply, please register your Xbox 360 console through our Xbox Online Service Center. Be sure that your shipping information reflects the US address you will
be moving to to receive the appropriate PSU for your region. Hope this helps!

 

500 Gb Xbox 360 E (Newest Model) PSU Question

Here is my summary: Spoke to an XBox support agent, they said to get a new machine since bestbuy cant just give me a new PSU. They said they will do the license transfer after I register my current device.

Im going to BestBuy later to get my replacement and im going to have them plug it in there to ensure the PSU doesnt make that sound.

 

I would just avoid the hassle of registering a used console and buy one from ebay or Amazon.

 

I found a live chat and they basically said the same thing.

I'm still utterly confused by the requirement to register a device to be able to order a replacement part. Nintendo doesn't require you to register a DS to order a replacement stylus...

 

I'm sure it's just to make sure you get sent the proper part for your console. Accidents happen and people pick the wrong thing to order online, not realizing. You can just call and place an order - 1800 4 MYXBOX.