Aporte original por: Breadman ,
OK. I found the problem. The filter between the housing and the loud speaker had some sticky hard stuff that was blocking the sound. I had originally blown out the filter with air and considered it clean, but on second attempt I actually took out the filter and inspected; that stuff would not come out with just air...needs some sort of solvent or soaking; I replaced filter (original might be cleanable but I didn't want to put in the effort and I had another from a defunct water damaged unit) and working flawlessly now.