This message was posted on behalf of Intel Corporation
To better understanding, could you please explain to me the way you are trying to connect them?
According to your computer specs, it says that only has one HDMI input and other HDMI output.
Here you can download the document for your Inspiron* 5348 specifications, page 5; http://www.dell.com/support/home/us/en/04/product-support/product/inspiron-23-5348-aio/manuals
Also you can find here how to configure 3 displays FAQ.