Magento2 Static Content – All Thumbnails Not Displaying

Try this Before that take Backup

1. Remove everything, except .htaccess file from pub/static folder

2. Open up app/etc/di.xml find the path “Magento\Framework\App\View\Asset\MaterializationStrategy\Symlink” and replace to Magento\Framework\App\View\Asset\MaterializationStrategy\Copy

Note: Remove entire files and folder under pub/static except .htaccess file.

For More info ref this http://www.dckap.com/blog/magento-2-admin-links-not-working-in-windows/

There is a simple way to solve this issue: in vendor/magento/module-catalog/Model/View/Asset/Image.php:226 remove the 'DIRECTORY_SEPARATOR'

private function getRelativePath($result)
{
$result = $this->join($result, $this->getModule());
$result = $this->join($result, $this->getMiscPath());
$result = $this->join($result, $this->getFilePath());
return $result;
}

and: /vendor/magento/module-catalog/Model/View/Asset/Image.php:130 replace DIRECTORY_SEPARATOR to '/'

 private function join($path, $item)
    {
        return trim(
            $path . ($item ? '/' . ltrim($item, '/') : ''),
            '/'
        );
    }

PHP accepts both \ and / as valid path separators. So just use / in your code.