UHK80 died out cannot wake up

Supposedly, UHK80 should be wakened up by pressing its keys, right? However, no matter how I press the keys it has no reaction. I connected the right side, and agent shows nothing.

It was ok to use several hours ago, and I brought my MacBook out for a while and came back then it died.

My system is macOS X, and my firmware is 12.3.1

Have you tried to reset it? The button ist the little hole on the right backside.

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Resetting saved my keyboard this time.

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