How to remove the Joomla logo from the Detail page

How can I remove the Joomla logo from displaying at the top of both the Category and Product Detail screens? My list of Products and Product Details display correctly, but there's a big Joomla logo at the top left of both of these pages.

Thanks!

We need link to see that because that is not expected behavior

I've attached 2 screen shots below. The first is showing the Category page (after I've selected a category and it displays all the products within that category). The second is showing the Product Detail page, after I've selected a product to view the detail about that product. The Joomla logo appears at the very top of those pages.

The Joomla logo is also appearing at the top of the contact page as seen in the latest attachment.

Thank you!

That is random image module that displays random image from folder you specify. Probably you have only joomla logo picture so you see only that.Just disable or reconfigure that module.