I have a WordPress blog that is on a VPS. Everything has been working fine until today when I realised that my featured images are no longer displaying. I logged in to my dashboard, media library, and all the image thumbnails are no longer displaying properly.

Before this time, I had a little issue with my caching plugin (W3Total Cache), so I deactivated it, and my site continued to function normally. But now, no featured image is displayed all through the site. What amazes me is that inline images in a post are still displaying in the site. [See example](http://www.loggtv.tv/2015/11/24/whao-ty-bello-chops-off-her-signature-afro-peep-her-new-look/).

Now my site's [homepage](http://www.loggtv.tv) is just blank, because no featured images are displayed. As of today, images which I attached in the post are just seen as links, but if the link is clicked, it redirects to the image. Here are some of the things I've tried so far:

* I've run `df -h` ssh command to verify if my diskpace is full.
* I've restarted `mysql` server several times.
* I've manually downloaded wordpress .zip file, and upload to the site.
* I've automatically `reinstall` wordpress using `http://www.example.com/wp-admin/update-core.php`.
* I've switched to a default theme.
* I've tried some of the resources similar to this question here, but none of the proffered solutions resolved my issue.
* My permission settings for all the sub-directories under `wp-content` is `755`. I have also tried changing them to `775` and `777`.
\*. I've used the Regenerate Thumbnails plugin to try to regenerate the thumbnails, but it returned an error `The error message was: The originally uploaded image file cannot be found at`, but when I view the image directly from my browser, it returns the image.
* I've also used the **WP Original Media Path** plugin to try and restore the media path (if it was messed up), but to no avail.
* I've deactivated all plugins too.
* I just checked my `wp_postmeta` table in my DB and it returned this error `wp_postmeta table is marked as crashed`

How do I rectify this issue?