wp-admin showing blank page

http://mywebsite.com/wp-admin showing white screen of death. Server seems to be updated to nginx. http://mywebsite.com/wp-login.php seems to be running fine. Any suggestion?
SmitWeb DeveloperAsked:
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Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:
Check your functions.php file and make sure the are NO spaces at the top or bottom.
SmitWeb DeveloperAuthor Commented:
I got the reason & solution. Hacked had hacked index.php of wp-admin folder. There was a junk code in index.php of wp-admin

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SmitWeb DeveloperAuthor Commented:
Website was hacked and hacker had updated wp-admin/index.php
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