Problem Description:
The Excel Services application for Microsoft SharePoint 2010 does not load or display workbooks.
This problem may occur in one of the following scenarios:
• In a custom-security configuration.
• When you add a new Web application to a farm.
• When you do not perform a default installation.
Probable causes:
This problem occurs because the service account that runs the Excel Services Application does not have access to the SharePoint content databases.
Resolution:
To resolve this problem, the administrator must grant access to the account to run the Excel Services Application. To do this, follow these steps for each Web application:
· Click Start
· click All Programs .
· Click Microsoft SharePoint 2010 Products
· Click SharePoint 2010 Management Shell
At the Windows PowerShell command prompt (PS C:\>), type the following command, and then press ENTER:
PS> $w = Get-SPWebApplication –Identity < URL of the Web application >
PS> $w.GrantAccessToProcessIdentity("< insert service account >")
Note: The placeholder <insert service account> represents the service account that you use to run the Excel Services Application.
After you do this, the service account is granted db_owner access to the SharePoint content databases.
If you have any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues J Thank you.