[USR-TC] ARC stopped responding to SNMP

Anybody aware of the cause or fix for a HiperARC that stops responding to SNMP? Running TCS 4.5 on HiperARC and HiperNMC. I have deleted and recreated the snmp communities and changed the status to RO/RW/ADM with no change. I am using Getif 2.2 to query the ARC. The HNMC is properly responding, however it was reseated previously. I would normally just reseat the ARC, but in this case that's a last resort. Any other ideas? Is there a way to restart the snmp service? -- Adam Barnhill