It boots fine with a nice little xecuter2 on the bottom for a couple of seconds then the screen goes blank and nothing. the lights are green with no flashing.
I desided to soder the mod on to the board. anyway I installed the harddrive and am gettign a code 5. the x2 isnt on the screen so i think im in the xbox flash.
D'oh! Should've stuck with the solderless since it was working.
Now you'll have to double check all your solder joints & try to figure out where you screwed up.