Ok so i've searched and read through 500 posts and did not find my exact problem. I go a 93 240sx w/HUD and digital speedo. I start it up and drive it somedays and it all works. I get out , get back in and start it up, all of a sudden the speedo nor hud work. Nothing else is not working when the speedo and hud aren't working. Sometimes it works then shuts off while i'm driving it. Anyone ever have this problem, just the digital speedo and HUD not working only sometimes, and having no other problems with anything else in the car??