As soon as I plugged in an ethernet cable, the link went up and down several times and now the default wireless network is broadcasting (??!).
Looking at the logs it seems the unit didn't even register as being powered on until I plugged in the ethernet, it was on for 5+ minutes but the log shows:
00:00:25 system,info installed routeros-arm-6.40.5
00:00:26 system,error,critical router was rebooted without proper shutdown
00:00:35 script,info Starting_defconf_script_
00:00:37 wireless,info wlan1: pre-shared key authentication not enabled, disable WPS
00:00:38 system,info device changed
00:00:38 wireless,info wlan1: pre-shared key authentication not enabled, disable WPS
00:00:38 system,info device changed
00:00:38 system,info device changed
00:00:38 system,info device changed
00:00:39 wireless,info wlan2: pre-shared key authentication not enabled, disable WPS
00:00:39 system,info device changed
00:00:40 system,info device changed
00:00:40 system,info device changed
00:00:40 system,info device changed
00:00:40 system,info device changed
00:00:40 system,info device changed
00:00:40 system,info device changed
00:00:40 interface,info ether5 link up (speed 1G, full duplex)
00:00:40 interface,info ether5 link down
00:00:40 system,info device changed
00:00:41 system,info device added
00:00:41 script,info port: ether2-master
00:00:41 system,info device changed
00:00:41 system,info bridge port added
etc