Can't detect HDMI signal (Edge-V Max)

After flashing Ubuntu no image available via hdmi. After boot blinking red/white leds. Supported resolutions of tested TV’s from 640x480 to 1280x720.

Hardware: Khadas Edge-V Max v.13
Image: Edge_Ubuntu-lxde-bionic_Linux-4.4_arm64_EMMC_V20190830
Firmware upgrade method: USB-C cable
Power supply: Khadas FC57

How to display image via hdmi?
Can i connect to hardware via SSH (UART) for fix resolution in xorg.conf ?