@FerryL 

@M4DECO 

Hi, How long have you had Deco M9 Plus?

Did it respond to the hardware reset? Or have you noticed any LED change, like solid red-yellow-blue, etc?

If not, It is suggested to contact the local technical support to see whether the Deco is still under warranty.

For more details, please also refer to LED loop on Deco/ Deco stuck in solid yellow

Thank you very much and Best regards.