200 Cup in Shite White
i was fitting a new head unit today, wired it all up correctly and just wired the ignition, turned key to see if it worked and was all working fine, listened to it for a bit etc to check all was ok, then i accidentally touched the metal part of the head unit with a loose wire from the back of the unit (no idea what wire it was) there was a tiny blue spark and it turned itself off, now i can't get it to come back on again 
tried changing fuse on yellow wire but to no avail
help? :S
tried changing fuse on yellow wire but to no avail
help? :S