This is a new posted that stemmed from a post a couple days ago.  Originally I thought it was a issue with Silverlight and 64 bit machines but that was not the case. The crux of the problem has to do with FQDN and specifying the port number.

On 64bit machines the only way the portal works is by using the NetBIOS name and the port number of either the AAM or the server,

For example:  http://servicemanager:83/smportal/SitePages/Service%20Catalog.aspx works fine but http://servicemanager/smportal/SitePages/Service%20Catalog.aspx returns a blank page.  Either one works just fine on a 32bit machine though.

• Edited by romualdt Wednesday, February 04, 2015 4:30 PM typo

Hi,

Have you checked the IIS settings?

Please refer to the link below:

FAQ: Why is my Self-Service Portal/Service Catalog Blank?

http://blogs.technet.com/b/servicemanager/archive/2012/05/04/faq-why-is-my-self-service-portal-service-catalog-blank.as

Have you also tried the FQDN of the server?

http://servicemanager.contoso.com/smport.....   etc.

Sounds more like a DNS or DNS Suffix issue to me.

Or maybe it is being set at a GPO?