Entire site blank pages
 

Two days ago my 3.8.4 test board was working perfectly. I've made no changes, and tonight I get a blank page for any page I try going to on the site. This includes the ACP. No matter what URL I enter for the site, it's blank.

I've already gone through this page of the manual regarding blank pages: http://www.vbulletin.com/docs/html/blank_pages. Is there any other reason this might happen?

My live site on the same domain and server is fine. It's just the test board that took a walk.