84300naZX

i did some searching and didnt find what really applied to me. the only thing in my car that doesnt work is the digital dash itself, the trip odometer portion works, and the idiot lights light up, but everything else is still out, ive taken the power unit out and cleaned the pins on it, my question is this. is there someone with a write up about refurbishing this box, not the one on z31.com but something a little more detailed. also i dont want wildbill to do it either as i find his prices to be outrageous personally. pictures of what needs to be done would also be helpful, thanks