How can I change the HDMI resolution on my device. To change your HDMI resolution for on your Netgem TV device. Go to settings > sound and picture > select HDMI resolution and select the resolution which best suits your TV. Related articles How can I change my Video format? Some channels are missing, what should I do? Can I change the Audio Output Mode? How do I use HDMI ARC to connect to other devices eg SoundBox HD? How do I connect my device to the Internet? Comments 0 comments Article is closed for comments.