hello, i have a hyster 210hd w/ Cummins LPG. s/n G007E03126D

i have been having this intermittent problem where the trans won't engage after start-up. i get a hard fault and an alarm and the little service light comes on. normally i can clear the fault by re-starting the truck but it does not work anymore, its stuck. last week i noticed the fault came up when i shifted into rev. i restarted and shifted into forward then back into rev. and it worked. now i cannot get around, it comes on every time i start it. i am not sure what direction to look in other than its tranny related. my best guess is maybe neutral switch issue. here's the funny part, it does show a code on the display, however the display is damaged and i am unable to accurately read it. any tips, tricks, suggestions, or advice would be greatly appreciated