My 2002 Rubicon has only 400 or so miles. After sitting in the shop for 8-10 months with no use, I started it up with the rope, battery was dead. I replaced the old battery. After this period of no use, the diaplay went blank. The backlight comes on, runs good, but no display of gear selection or speedometer, etc. Anyone know what the problem may be? I am guessing bad display, but any troubleshooting advice would be good.