Very quick confirmation required please

I have today received my replacement laser module from Ortur. Can someone please confirm that it is normal for,
1/ the Laser Module to make a sound similar to a fan running constantly when powered on (not lasering)?
2/ is it normal for the module to be powered up before pushing the Power On button on the unit, with only mains power connected? As if power is going direct to the module and not through the power on button?
3/ Does the orange light near the top of the unit purely represent power on and nothing else?
Thank you.
Mike

Surely someone can answer the questions above? they seem simple enough to me for someone to check. I’m reluctant to start trying to use the machine incase there’s an issue.

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