Review on OSCY 7-inch Portable Monitor with 1024X600 Resolution, Built-in Speakers and Earphone Port - DD-7F-XSQ by Moussa Parnell

I used a known good HDMI cable and a known good device set to various resolutions that the TV info sheet says it can handle. The HDMI signal never worked. I kept getting "No Signal". When I selected the HDMI output, there was no way to press a button to make sure he knew which one I wanted to use. I would select HDMI as the input and leave it on for the menu to scroll. No signal. I pressed the "Input" button again and it appeared on the AV1 input. That happened all the time. I tried setting it to input via HDMI and it stayed - it did NOT stay on the HDMI input and didn't display any video sent to it via HDMI. Why isn't the port working? Why advertise HDMI if it doesn't work?