I have a MD300 that will come on intermittently, sometimes it shows Lost Conn. Sometimes it comes on and has a code 61, display reads 8 vdc. I got it to start once and it still showed 8 vdc. Everywhere I check voltage it is 12.6vdc. I have tried a new micro, display, display harness and relay board. Anyone have any ideas or ever see this before. The customer got it to run for 20 min or so today, then it just shut down and went blank.