I started my plane for the first time in two months and the EMS didn't turn on. The main battery is on a battery tender and started the engine just fine. Also, the EFIS-D10A started when I turned on the Avionics master. I turned off the master and turned it back on. The EMS illuminated to the splash screen, but nothing more. As I previously read here, I have cut the keep alive wire (pin 2). Is cutting that wire still recommended? Is it related to the unit not booting after a two-month time without power? What should I try? I'm still at version 4.