If you log into admin dashboard via wordpress and are faced with blank/white dashboard areas, try the following fix.

Open file blog/wp-admin/includes/screen.php in your favorite text editor.
On line 706 or close by (depending on version) find the following PHP statement: echo self::$this->_help_sidebar;
Replace it with the statement: echo $this->_help_sidebar;
Save your changes.
Go to a dashboard page.