Question: I need to display an image stored in the files of my org in alightning component. 
For now I just want to display an image, with its Id, not dynamically. 

I tried this in my component: 

```
<img src="{!'/servlet/servlet.FileDownload?file=0696E000000AT3BQAW'}" alt="" />

```

but the image is not displayed.

Answer: 
You need to use the `ContentVersion` (prefix 068), not the `ContentDocument` (069), then you can display it like this:

```
<img src="{!'/sfc/servlet.shepherd/version/download/' + v.contentVersion.Id}" />

```
Just remove the `{!''}` since you are refering to an absolute path.

`<img src="/servlet/servlet.FileDownload?file=0696E000000AT3BQAW" alt="" />`