[SOLVED] Headless Android | No micro-HDMI connected

Hi, already installed the slimboxtv android rom,
but one issue, can’t fully start android without connecting to monitor.
(I want to use the radxa zero as headless android and control via usb mirror.)
Does this issue occurs on other radxa zero roms?

Edit: Other roms for Radxa Zero are allowed to boot without screen. Slimboxtv rom requires dummy plug or tweak on settings but now also works.