Hello everyone. New here. Have a DB1 about 18 months old. Have two issues with it and because it came thru an alarm install Ezviz won't help much on it although they did their best to help. The problem is that about 3 weeks ago the mechanical chime failed. Tech Support said they thought that the power supply kit failed. They could not sell me one but I found an identical one thru REMO. Installed it today, installed new 16V 30VA transformer last week even though the one we have seemed fine and the older RING doorbell rings the chime loudly. So today I played with it some more, downloaded EZVIZ Studio 2.1.1, restored to factory defaults, rebooted, removed, deleted from EZVIZ android app and on and on. Every IT trick I could find even ping it and it pings fine. I've written EZVIZ again to see if they can send me a link to the firmware for it, even though it shows the latest firmware on it. All other features work but it does get hot, 130F on the back. Ring g1 doorbell is back in right now but when I get the firmware I thought I would flash it again and see if that might fix it. Outdoor bell is fine but not chime indoors. Again, worked fine for 18 months although it did lose the chime a couple times before - when simply rebooting it and setting it back up again would fix that. It no longer does. I can't find any trick that brings the chime back. Also concerned about that 130F. That is like burn your hand hot.