The Excel Services Application for SharePoint 2010 does not load or display workbooks

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.