My Canon EOS 70D does not connect with my computer with the micro usb and mini HDMI ports. I can not use anymore wifi because of country restriction to use the app on my smartphone.
The LCD screen do not work.
It is not supposed to work that way. The USB port on the camera should only connect to a USB port on a computer. Likewise, the HDMI output on the camera should only connect to the HDMI input of a monitor or recording device.
Connecting an HDMI connector into the HDMI port on the camera should blank the screen. The camera has only one set of video output electronics. It is able to drive both the rear screen on the camera and the HDMI output concurrently.