Console

Hi again,

Are you able to test this Xbox 360 on another TV? Does it do the same horizontal scrolling lines like you're seeing on your TV currently?

Have you tried to reset your Xbox 360's display settings? You can do this by following the directions
here.

Either wired or directly through Ethernet, whichever you prefer or available to you really.

If you have an original 360 you will need to buy a wireless receiver if you want to go that way, but they are built into the new S model.

I use an Ethernet but my hub is about a foot from my console so I don't need wires trailing round the house.

Here's whats on the support pages:

Manage your Xbox LIVE account

What membership activity do you need to complete?
Renew or cancel your membership

Renew your Xbox LIVE Gold membership or Xbox Music Pass
Learn how to renew your Xbox LIVE membership either from your computer or on your console and how to update your Xbox Music Pass subscription.

Cancel your Xbox LIVE Gold Membership
Find out how to cancel or turn off auto renewal for your Xbox LIVE Gold Membership.

Cancel your Xbox Music Pass
Find out how to cancel or turn off auto renewal for your Xbox Music Pass subscription.

Manage your Microsoft Account

Questions about a Microsoft account or a gamertag
Learn how to view, change and manage password options for your Microsoft account and Xbox LIVE membership. Find a lost password, get answers to billing questions, troubleshoot common errors, and more.

Find your Microsoft account
Learn about your Microsoft account (formerly your “Windows Live ID”). Find a lost password, a parent Microsoft account, or a child Microsoft account.

Check or change your billing information

Check your Xbox LIVE or Zune billing and purchase history
Learn how to view and print a list of the charges on your Xbox LIVE and Zune accounts.

Change Your Xbox LIVE Account Information
Learn how to change the billing account name, address, phone number or email address associated with your Xbox LIVE account.

Update your payment options

Add or change your Xbox LIVE or Music Pass payment options
Learn how to add or change a payment option (such as a credit card) that’s associated with your Xbox LIVE account or Xbox Music Pass subscription account.

Change Payment method for an Xbox LIVE Membership

Learn how to change the payment option associated with your paid Xbox LIVE membership. This procedure can help you reinstate a suspended account.

Remove an Xbox LIVE payment option

Learn how to remove a payment option (such as a credit card) from your Xbox LIVE account.

Use PayPal with Your Xbox LIVE account
Learn how to use PayPal to purchase Xbox LIVE Gold memberships, games and Microsoft Points. (PayPal is not available in all areas.)

This can happen a couple of ways. If you've ever owned more than one Xbox then more show up. It can also happen if you download your account to another xbox to play. Possibly at a friends or something like that, causing more than one console to show up on
the account screen.

Should be some bug on the display information. You dont have warranty on the O.S. only on the console.