Should i buy the xbox 360 repair guide from www.3redlightfix.net?

I dont have any of the red ring issues, everything is perfectly fine except theres no video. the audio is there and my warrantys up. One of my friends suggested this website and it looks trusting but im not too sure. I dont want to spend $100 on repairing it with microsoft because of all of the talk that it comes back messed up too. What should i do, I have been without my xbox for 2 months and i really want it to be fixed soon. Should i trust this website (only $25 for the guide) and if I should trust it, should i get the pdf file, the cd or the book? thanks a lot, i really appreciate every answer and i will pick a best answer.

Well you can get refund if you don't like it even if you do like it