Mic mini to IIyama ProLite E431S: signal frequency out of range

Hi, I've just got a problem with the display (despite everything worked well together for more than a year): the screen is black, with only the following message:
Attention signal frequency out of range
H: 05.2 KHz V: 05.2 Hz
Please change signal timing
It suddenly happened yesterday, but everything was OK since I bought it, except some quick shutdown of the display from times to times
I don't know what to do, since I've got only one display so I can't modify the parameters of the mac mini
Thank goodness I also have a laptop to write this message.

Try starting in Safe mode. To do this, hold down the shift key during a restart. Hopefully you will get a working screen back. Then change the display settings to what you had before and restart normally.

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