If, after installing Reporting Services you see a blank screen when trying to open Report Manager, you can try the below methods to get you moving.
· Enable Integrated Windows Authentication in the Reports (and ReportServer) virtual directories in IIS, and disable Anonymous Access.
· Restart IIS (iisreset on command line)
· Try to open Report Manager. If your account is recognised as an Administrator, you should see more content in Report Manager.
· Add the local anonymous IIS account (IUSR_MACHINENAME) to the Administrators group for the local machine (this is just temporary, read on).
· Restart IIS (iisreset on command line)
· Try to open Report Manager - you should now see full content.
· Go to the Properties tab, and click New Role Assignment. Grant the IUSR_MACHINENAME account the appropriate privileges to access the Report Manager (be careful not to allow too much access since this means your users could change/delete reports).
· Remove the IIS account from the Administrators group for the local machine.
· Enable Anonymous Access for the Reporting Services virtual directories in IIS, and disable Integrated Windows Authentication.
· Restart IIS
· You should now be able to see the appropriate content within Report Manager.
Hope this helps! It worked for me, and I had been going mad with frustration