HTTP error 503 : Service Unavailable

I changed My windows server Administrator Password and My Sharepoint Central Administrator stopped working.

and started giving me following error.

SharePoint Service Unavailable HTTP error 503 : Service Unavailable

After a long head banging, found the issue. The Sharepoint Central Administrator Application pool was stopped.


I tried to start the pool many times but always stopped. Issue the Identity running the service.

to Fix this issue, just follow the following instructions.

Right click on  Sharepoint Central Administrator Application pool and select Advance Settings


Select Identity and change that


Changed the Service identity .. I changed to Administrator and all went well.