The SCOM Web Console is a nice way of displaying alerts and health states using the web. No full GUI needed and just the default web port (depending if you installed as http or https). Great. But it is possible that you run into problems with the web console. It may not work for some reason (either during install or right after or after some time).
In case this happens to you, here are a few resources to go to and check if this solves your issues:
Common Issues with the OpsMgr Web Console
http://blogs.technet.com/b/kevinholman/archive/2010/04/07/common-issues-with-the-opsmgr-web-console.aspx
There are a lot more links from this post by Kevin, so check it out!
The system Center Operations Manager 2007 web console fails to open with “Error: Could not load file or assembly ‘Microsoft.ReportViewer.WebForms, Version=9.0.0.0”
http://support.microsoft.com/kb/2010168
Also a very good way to solve some web console errors is to re-install the feature, like Marnix says here and I have to say this has helped me a few times as well and increased the speed to resolve the issue.
http://thoughtsonopsmgr.blogspot.com/2009/08/opsmgr-r2-webconsole-wont-start-after.html
Web Console Security in Operations Manager 2007
http://technet.microsoft.com/en-us/library/bb735415.aspx
How to configure a Stand-alone OpsMgr 2007 Web Console for Windows Authentication
http://www.systemcentercentral.com/Downloads/DownloadsDetails/tabid/144/IndexID/6193/Default.aspx
