Artman...refer them to that support thread I referenced. Per that thread, start a chat with support and have them document what you have attempted, and their solutions.
If you are still under warranty, you can request a repair. I am about at that point. Unfortunately, I have no faith in the repair team. You can request that they repair your original console, but there's nothing to hold them to that agreement. The last time I gave a special request that they send me my original repaired 360 PRO. They may as well have laughed in my face...they did what they wanted, anyway.
And there are multiple posts in that thread of people who've received two and three refurbs with the same issue. I'm not interested in fighting that.
"Once you learn good English...Can't nobody take it away!"
Xbox LIVE Gamertag: KEVIN G 40