Magento How to debug blank white screen

Question

I have an error in my Magento backend that results in a blank screen (WSOD). I have set errors to on in admin but there is nothing being created in var/logs/. (I have checke

Answer 1

This could be as simple as a template conflict. Revert to default template in System/Configuration/Design/Themes.

Answer 2

I was also facing this error. The error has been fixed by changing content of core function getRowUrl in app\code\core\Mage\Adminhtml\Block\Widget\Grid.php The core function is :

public function getRowUrl($item) 
{ 
$res = parent::getRowUrl($item); 
return ($res ? $res : ‘#’); 
}

Replaced with :

public function getRowUrl($item) 
{ 
return $this->getUrl(’*/*/edit’, array(’id’ => $item->getId())); 
}

For more detail : http://bit.ly/iTKcer

Enjoy!!!!!!!!!!!!!

Answer 3

I tried all the suggested solutions but no luck.

Finally I found I need to use admin layout & template & skin from a fresh Magento version that you need to upgrade to. For example in my case it is 1.9.2.4

• Use adminhtml layout & template to make the admin theme can be loadable

-- Basically, get all the files (from app/design/adminhtml/default of the fresh version), copy and paste these to the folder app/design/adminhtml/default of the current site to replace all the old files if any

• Use adminhtml skin to make the admin theme can be displayed correctly

-- Basically, get all the files (from skin/adminhtml/default of the fresh version), copy and paste these to the folder skin/adminhtml/default of the current site to replace all the old files if any

Of course, remember to make backups before doing that.

The best is to use a version control as GIT or SVN.

Answer 4

It can also be when you don't have a proper php extension loaded. I would double check that you have all of the required php extensions loaded on your system if it isn't the memory limit issue.

Answer 5

I had the same problem, it was solved after re-installing my Theme

Answer 6

I too had the same problem, but solved after disabling the compiler and again reinstalling the extension. Disable of the compiler can be done by system-> configration-> tools-> compilation.. Here Disable the process... Good Luck