To set the source to HDMI we will need to change the setting in the monitor menu. The VGA input is usually the default input. Monitors with a HDMI input usually have more than one signal source, including VGA, DP and DVI. Method 2: Change the monitor input source to HDMI

This applies to cases where you are using a HDMI to HDMI port connection and not via the mac mDP. Here is how you can get the monitor working again. This is the most overlooked reason why the HDMI input gets no signal on your monitor. If you have not changed the input source to HDMI, then you will not get a signal via your HDMI cable and your computer will not detect it enter.

Usually, monitors come with the VGA input set as the default input. High-end monitors usually have more than one input source. There has been no official reason as to why this occurs, but it seems that the monitor gets stuck to some settings that are not compatible with the HDMI output of the PC. On getting it back to the work PC, nothing displays. You might be using the monitor in your work PC, but change it over to the gaming PC.

The case of the HDMI output failing after some period of use is somehow related to switching the monitor between two PCs. Users might encounter the HDMI not working problem in a new monitor, or the problem might have developed suddenly after some use. However, there have been numerous complains about the HDMI display on gaming monitors like the S2716DG Dell monitor. With a 4K display (2560 x 1440) you can get Ultra Low Motion Blur (85 Hz – 120 Hz refresh rates) or up to 144 Hz refresh rate by using an NVidia G-Sync. High end gaming monitor offer one of the best gaming display performances along with a list of features to match up with gamers’ speed of reaction while displaying clear and undistorted images for the best gaming experience.

Mac vga adapter not working