What was the original reason for you to carry out the re-install?
If the current issue appears similar to the one you were trying to resolve with the restore, then you need to troubleshoot. Did you install or update any new plugins just before the issue? If yes then you may have luck by resetting the plugins folder to get access back into the site, and try to isolate the problem plugin.
Did you install a new or update your existing theme? If so, then try reverting to the stock WordPress Twenty fourteen theme if you have access to the dashboard.
Are you using a security plugin? These can break sites, and if so you should check the support forums.
Are there any clues in the error logs in your cPanel?
You could also set Wordpress to debug through the wp-config file and check the log for information.
Another thing that can break a site is changes to the .htaccess file in the root. You could check the content, keep a copy and then strip out all the code except the standard WordPress rewrite rules
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPressFinally, you could contact your host and ask for a restore to your last know healthy site date.