Hi Fiona….I’m assuming you are using a widget to load in an image or slider? You have a few options:
1. Install Widget Logic plugin then in the bottom of the widget, add this: is_front_page()
2. Install the Advanced Text Widget, then insert your image with that and select “Front Page” on it’s setting.
3. Install Dynamic Widgets plugin and use that to assign “any” widget to select pages.
I would recommend option 2 and install the Advanced Text plugin because it has settings to show the widget where you want…in this case, the front page. You would just need to add your shortcode to the text field of it if you are using a slider, or if it’s an image, use the tag to insert your image.