I had a similar issue with my 2165. It would start, but then quit.
After a great deal of testing, I replaced the Voltage Sensor PN 925-3251, and it's worked fine since. Apparently, if something goes wrong with that, it will start, but then quit.
It's also possible that the brake safety switch is either disconnected, or the switch has died. It's in a very difficult to reach place underneath the steering column.