It will flash green with only the 7 lpc pins connected, I think I seen something about having to recover the L frame in order to get a matrix to work in anything over a 1.2
you might want to look into that first before retry..
The easiest way would be to get a compatable mod for you new box & keep the matrix in the old one.
Have you considdered flashing the Tsop? it's not as hard as you might think...
Good luck, Valius