Issue Details
Lync Server 2013 Front end Server is not running and keep on showing service status starting
Cause: The Reset-CsPoolRegistrarState cmdlet enables you to reset the Windows Fabric service (FabricHostSvc) and the Lync Server Registrar service (RtcSrv) for a Registrar pool; this might be required if the pool has become non-responsive or fails to start. (Typically that means that the Registrar service will remain stuck in the Start Pending state.)
Resolution:
Run the following command in Lync Management shell
Reset-CsPoolRegistrarState -PoolFqdn "atl-cs-001.litwareinc.com" -ResetType FullReset
Reference :
http://technet.microsoft.com/en-us/library/jj619172.aspx