Potato (AML-S905X-CC) weird HDMI problem

Potato won’t send signal to my monitor when I plug the HDMI if it has been running for some time already (I don’t know exactly, but I would say 30 min to an hour). Is it possible that it’s an electrical problem? The adapter I have right now outputs 5V and 1.0A, but I read that the board needs at least 1.5A to function. Did anyone else have this problem?

Hot plug is supported. HDMI is sensitive to voltage fluctuations.