Recover SharePoint 2013 Databases from Suspect Mode
EXEC sp_resetstatus 'SharePoint_Config';
ALTER DATABASE SharePoint_Config SET EMERGENCY
DBCC checkdb('SharePoint_Config')
ALTER DATABASE SharePoint_Config SET SINGLE_USER WITH ROLLBACK IMMEDIATE
DBCC CheckDB ('SharePoint_Config', REPAIR_ALLOW_DATA_LOSS)
ALTER DATABASE SharePoint_Config SET MULTI_USER
DBCC CheckDB ('SharePoint_Config')