Yeah, usually blank page issues are either caused by:
1. Plugins. Moving or renaming the plugins directory will fix this.
2. Themes. A little trickier to fix and requires basic mysql/copy paste knowlege.
Basically, if I come across a blank page problem, and it’s not the plugins, I run the following in MySQL on the wordpress database:
(NOTE! BACK UP YOUR DATABASE BEFORE HAND JUST IN CASE. I AM NOT RESPONSIBLE FOR ANY POTENTIAL FURTHER DAMAGE CAUSED. At worst I think you might lose your widget settings. Just saying)
select option_value from wp_options where option_name = “template” OR option_name =”stylesheet”;
If the values returned are anything other than ‘default’, do the following:
update wp_options set option_value = ‘default’ where option_name = ‘template’ or option_name = ‘stylesheet’;
Then refresh your blog. If it was a theme, this should fix the issue. This can be run in either MySQL on the command line or phpmyadmin.