The psncollector service runs a ‘prtfru -x’ command, which can take several minutes to complete on a large server like an E2900. With the 120 second timeout, the start method fails:

# svcs -x
svc:/application/psncollector:default (Product Serial Number Collector)
State: maintenance since Sun 25 Jan 2009 10:01:34 AM PST
Reason: Start method failed repeatedly, last died on Killed (9).
See: http://sun.com/msg/SMF-8000-KS
See: /var/svc/log/application-psncollector:default.log
Impact: This service is not running.

# tail /var/svc/log/application-psncollector:default.log
[ Jan 25 08:59:51 Executing start method ("/lib/svc/method/svc-psncollector") ]
Using /var/run
[ Jan 25 09:02:01 Method or service exit timed out. Killing contract 48 ]
[ Jan 25 09:02:05 Method or service exit timed out. Killing contract 48 ]
[ Jan 25 09:02:18 Method "start" failed due to signal KILL ]

The easy fix was to increase the service start timeout value:

# svccfg -s psncollector setprop start/timeout_seconds=480
# svccfg -s psncollector setprop restart/timeout_seconds=480
# svcadm refresh psncollector
# svcadm clear psncollector

Once cleared, the service started up, taking its usual 3+ minutes.