I wanted to post the better links that I found as a solution as there are so many that are BAD !
I will get around to that but better first I write about my findings while doing this.

My findings on RROD – on my xbox 3 year old elite

How to open up the case XBOX 360 not using a case tool.

Find the rest of this article on cambs site >> Repair Xbox RROD UK Cambridgeshire