Can't login Using WP-ADMIN – Blank White Screen

Without any recent changes that I am aware of I am no longer able to use wp-admin to login. Instead I get only a blank white screen. The website is working fine other than that. I also have two other WP websites working fine using wp-admin to login on the same server. I have tried all the steps recommended in other like threads, but no resolution so far.

Step 1. Renamed Plugins folder
Step 2. Renamed current theme “Easel” to WordPress “Twentytwelve”
Activated Debug and attempted to login:
[16-Apr-2013 18:51:10 UTC] PHP Notice: wp_enqueue_script was called incorrectly. Scripts and styles should not be registered or enqueued until the wp_enqueue_scripts, admin_enqueue_scripts, or init hooks. Please see Debugging in WordPress for more information. (This message was added in version 3.3.) in /home/onvigil7/public_html/wp-includes/functions.php on line 2959

Here’s the code from functions.php
/**
* Is the server running earlier than 1.5.0 version of lighttpd?
*
* @since 2.5.0
*
* @return bool Whether the server is running lighttpd < 1.5.0
*/

function is_lighttpd_before_150() {
	$server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
	$server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
	return  'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
}

I hope you can help and your expertise is appreciated. If additional information is required please let me know. Thanks!