Hello, I purchased a df64v grinder, and after I used it 4 times, it started to make an electric loud noise when it is connected to power supply but is not turned on. I tried to get in touch with you and I sent you a record of the sound, and I wait for a reply. I'm not sure if is safe to use it and I unplugged from power supply.Thank you
Hello, I purchased a df64v grinder, and after I used it 4 times, it started to make an electric loud noise when it is connected to power supply but is not turned on. I tried to get in touch with you and I sent you a record of the sound, and I wait for a reply. I'm not sure if is safe to use it and I unplugged from power supply.Thank you