FWIW: if you go back to the picture of the E1 rack (front of the avionics bay)
http://www.pprune.org/rumours-news/5...ml#post7956851
On the top row the 4th box over (1st box is silver with blue label) is the Flap/Slat electronics unit. On the 2nd row the 1st box is the anti-skid/ auto brake box.
Quite possible after being impaled by the nose gear these systems were not operating correctly. May be why the plane went off the runway and why the evacuation checklist appears not to have been completed.