6) OpManager will try to start all modules with a message" started " for each modules (If any of the modules says failed, there could be some problems which needs to be fixed)and finally will prompt you to connect to the Webclient using Servername/IP:port.
(Ex:Please connect your client to the web server on port: 9090 as http://OpManager:9090)
(Note : If you get "DBServer failed " message , most of the cases it will be because of your Antivirus running on the server, disabling Antivirus and restarting OpManager will fix the problem)
7)Without closing the command prompt , open up a web browser window and try to access Opmanager webclient.
8)If everything looks good , you can stop Opmanager through command prompt by pressing Control + C and type "Y" to terminate all process and start "ManageEngine OpManager Service " and make sure it works fine.
(The above steps are applicable for both OpManager Stand alone and Enterprise versions)
Note : Only one method at a time should be used to start Opmanager ( either through windows service or command prompt not both at a time)