Apparently at the 2560×1440 setting using HDMI, the WiFi drops out. While you could think that an SoC might not be able to handle a high resolution, WiFi, and everything else this tiny computer ...
You can easily get a wireless Miracast adapter for your TV. These dongle-like adapters plug into your TV’s HDMI port and take power from the USB port. (See image for reference). These devices ...