Hi,
one of your plugins is causing that blank page problem.
This is what I get only with SwiftFramework, Woocommerce and Revolution slider activated.
https://www.dropbox.com/s/ns5qucoilnvq7wo/Screenshot%202015-08-21%2016.35.05.png?dl=0
Deactivate all plugins except those 3 above, and then activate one by one or several at each time until figure out what plugin is causing the problem.
-Rui