Opening Error

Self-repairs are not allowed with the 360 and are considered system tampering.

From the Terms of Use:

12. Service Operation and Equipment.

The Service may only be accessed with an Authorized Device or by logging into your account via Xbox.com. You agree that you are using only authorized software and hardware to access the Service, that your software and hardware have not been modified in any unauthorized way (e.g., through unauthorized repairs, unauthorized upgrades, or unauthorized downloads), and that we have the right to send data, applications or other content to any software or hardware that you are using to access the Service for the express purpose of detecting an unauthorized modification. Any attempt to disassemble, decompile, create derivative works of, reverse engineer, modify, further sublicense, distribute, or use for other purposes the Service, any game, application, or other content available or accessible through the Service, or any hardware or software associated with the Service or with an original Xbox or Xbox 360 console is strictly prohibited and may result in cancellation of your account and/or your ability to access the Service, and the pursuit of other legal remedies by Microsoft. Microsoft may take any legal action it deems appropriate against users who violate Microsoft's systems or network security, this contract or any additional terms incorporated or referenced in this contract, and such users may also incur criminal or civil liability.

Microsoft reserves complete and sole discretion with respect to the operation of the Service. Microsoft may, among other things: (a) restrict or limit access to the Service; (b) retrieve information from the Authorized Device and any connected peripheral device used to log onto the Service as necessary to operate and protect the security of the Service, and to enforce this contract; and (c) upgrade, modify, withdraw, suspend, or discontinue any functionality or feature of the Service, any game or other content available or accessible through the Service, or any hardware or software associated with the Service or with an Authorized Device, from time to time without notice, expressly including by the automatic download of related software directly to your Authorized Device, including software that prevents you from accessing the Service, playing pirated games, or using unauthorized hardware peripheral devices.

Unfortunately, there is nothing you can do. Once you've opened your console, its pretty much considered system tampering.

I think MS will tell you much the same as well.

Only way that I can think you'll get it fixed, is by using a unoffical repair company, but then you run the risk of further errors.