Sounds like distant thunder when the unit is powered up -
Often within 15-30 minutes of being on - it will settle down and be quiet.
Yes, I have opened it up - I am a certified electronics technician and technologist.
Note attached You Tube video. Any ideas?
Can you please share how you fixed this issue. We are facing the same with one of our device
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: