wp-admin shows blank page, how to fix it?

Question

I am working with WordPress 3.5.8. Yesterday I made some changes into it to a friend. I don\'t know what happened, but after some time when I try to log in at wp-admin side and

Answer 1

first of all check your internet its connect!

second is turn on WP_DEBUG and write this codes in wp-config.php

define('WP_DEBUG',true);
error_reporting('E_ALL');
ini_set('display_errors',1);

third is rename themes and plugins folder that in wp-content folder to other name sush as

pluginss , themess

S F my english!