I have Matrix modchip flashed with xecutor2 bios...if you have a v1 xbox and the matrix is flashing green you should be ok....if you have a v1.1 and the matrix is flashing green that doesnt necessarily mean the matrix is properly aligned. I found that filling the d0 with a little solder helped with alignment even though i didnt get a green light in mode 1....i switched to mode 2 and was able to boot games and backups.
make sure matrix is aligned, the xbox bios will still boot even though the matrix is on...but again if its not aligned it wont boot any backup or unsigned code.
hope this helps.
