No sound I replace the battery and now no tones. Alarm has no sound. When I switch from screen to screen there is no beeping

Take watch spring bar....cut i of....take spring inside the spring bar..use it as a replcement for your lost spring that connect board to bodycase for sound..cut the spring just enough to connect d board and backcase..hope this can help everyone that lost their spring

Use a small amount of wire to make contact between the inside of the metal cae and the contact point where the spring was; there are two on the top and at least one in the bottom. Did it myself. I used picture-hanging wire, unrolled a bit and just wide enough for a "patch cord." revisit it when the battery rund down, like 2 to 10 years from now.

When you replaced the battery you must have dropped a tiny spring from the module. This spring activates the beeping sound.

Is your battery indicator showing a full charge? Sometimes if it's not showing full then the sounds are disabled. If it's not full tape it to the inside of a window for a couple days and see if that gets the indicator up to "full charge" Otherwise you are going to have to send it in to have it repaired.