[HDMI output not working when using pc remote]

There may also be other solutions as well (that are cheaper). What exactly are you trying to do with (2) laptops connected to the camera at the same time? Are you looking to control the camera with one laptop and then monitor the feed via the 2nd laptop? 

Yes, I usually cover events where once I set up a tripod I can only control it through laptop so that I don't disturb the audience and a6400 does not have a audio out port to monitor the input audio however the HDMI signal does send a audio output which can be monitored using a video capture card and OBS. 

[HDMI output not working when using pc remote]

Hey,

So I was using my a6400 on pc remote mode and controlling it on a laptop via USB and remote application. when I tried connecting the HDMI to a Second laptop using HDMI capture card there was no HDMI output it was just black. However once  I disconnect the USB the HDMI outputs the image normally but if u connect it to a laptop the HDMI output disappears again. Anyone who has tried this or has faced this issue?