Wordpress troubleshooting

http://codex.wordpress.org/FAQ_Troubleshooting

Add Media Button Not Working

Open “wp-config.php” file in the root directory of wp
Search for this line:
require_once(ABSPATH . 'wp-settings.php');
And just before it add this code:
 define('CONCATENATE_SCRIPTS', false );
 =======================
Visual editor show blank page
add the following code in wp-config.php
define('SCRIPT_DEBUG', true);
define('CONCATENATE_SCRIPTS', false);