Eurasia should support the 1.4 xbox, and the Focus video chip is a pretty good giveaway of that. A black screen on boot, in my experience, is the xbox not being able to read the disc correctly. If you're using media that has worked on your xbox before, and you burned it in the same way that has worked for you before, then it sounds like a tough problem. Have you considered doing some pot tweaking
to adjust the power of the laser inside your DVD drive? Also, does the DVD eject itself after a few minutes? If so, that could be Eurasia working correctly.