li9ssb on "problems in the database"

I consulted various topics about before inserting this post.
In my database there are no problems, via phpAdmin.
The problem is access websites that I manage to databases.
All of them are without access as described above.
I can not access the control panel, also tried to log in, register, etc., without success.
Insert in wp-config recommended lines of debug but still have no answers:

  // Enable WP_DEBUG mode
define ('WP_DEBUG', true);

// Enable Debug logging to the file /wp-content/debug.log
define ('WP_DEBUG_LOG', true);

// Disable display of errors and warnings
define ('WP_DEBUG_DISPLAY', false);
ini_set ('display_errors', 0);

// Use dev versions of core JS and CSS files (only needed if you are modifying these core files)
define ('SCRIPT_DEBUG', true);