Larkbox no display signal

hi my dear larkbox sudden stopped working one fine day and there is no display signal, even when the blue power LED is on. Pls advise how to reset it to get back the display signal.

Check for any loose cables that connect the hardware to the monitor.

No loose cables, have tried using different working hdmi cables and TV and monitors and none receive display signal from larkbox

Congratulations! You just bricked your Larkbox.

Is there any ways to revive my larkbox?