[NAME] Is this an Inspiron 5400? As [NAME] mentioned, the USB-C may not support video. Specs for the Inspiron 5400 only say USB 3.1 Gen 2 (Type-C) port. No mention of video support. Just get a standard USB3>HDMI dongle or USB3>DP dongle depending on what ports your monitor has. Make sure the dongle supports both your version of Windows and the "recommended" (aka: "native" or "optimal") resolution for the monitor to be connected to the dongle.
So I bought from Costco a Dell Inspiron i5400-7910SLV-PUS All-In-One Desktop, i7-1165G7  AIO. I've finally got my wife onto the idea of multiple monitors and now that she's tasted 2, one the built in AIO and a second, she would love a third monitor.  She never games on this, just email, shopping, YouTube, WhatsApp, and ZOOM.  I just so happened to have 2 Samsung 24" monitors that have HDMI or S-VGA inputs ONLY. So i plugged one HDMI monitor input into the HDMI output on the back of the unit and purchased a USB-C hub that had an HDMI output and usb3 and a couple other things.  The 1 screen plugged into HDMI on the back of AIO, no problem. I plugged the second into the HDMI output on the USB-C hub and I just get a black screen. I swapped screens, same thing, I added an extra power input to the USB-C hub in case it needed more power for some reason and same result. So is there some reason the USB-C output will never send screen output from this unit, or is it just my USBC hub that's the issue? Or do I need to get a cable that's USB-C - HDMI or USB-C - SVGA so that I have a different type of output to make the 2nd outboard monitor work? I'm quite disappointed by the lack of outputs on the back of this unit to be honest, 1 USB-C, 1 HDMI output, 1 HDMI input and some USB A.  Because there is only 1 USB-C output I don't want to purchase a cable to plug directly into the computer if possible. The SD card reader on the back of the unit is stupid and my wife can't reach it, which I why I bought the USB-C hub so that she could use that, and I could get the extra HDMI output that I needed.   Any help would truly be appreciated, I've been searching for weeks and can't seem to find the answer to my problem.
I want to set up 3 monitors including AIO that is running my wife's setup