HDMI does not work. A couple of times there was an image but for a few seconds. (LED - Red, Green is blinks) OS Linux Kali, Linux Ubuntu 16 Mate from the official site. SD card 64 Gb. HDMI-cable on other devices is working. Power supply 5v 2A (tested by multimeter)
are you use HDMI to VGA line ??? or you try another display??? maybe you need check this at first.
I use the display full hd. HDMI - HDMI cable Cable and display work with other devices.