Unfortunately, it is usual and normal behaviour for Zidoo. Just look on quantity and quality of firmware of X20/X20 pro....
hello there, today finally my x20 pro has no signal too. yeeyy... contact local reseller, no help. any workaround that finally fix the issue?
Try pressing the Resolution button a few times leaving a gap between presses to allow HDMI to resync. This cycles HDMI resolutions.