In my case it is actually the panel most likely. I’ve switched the panel from the problematic speaker to the good one. And the problem seems follow the panel. Right now the humidity is constantly lower than 55% so the problem is not present. I’ll post an update when summer comes.
How can power supply be affected by humidity tho? I found 55% of RH is the threshold for the noise to appear. If I blow on the panel lightly, the noise level will dramatically increase due to the increase of moisture level.
I should have been more specific with the result of washing only the front side of the panel. So I’d say 95 percent of the noise is gone. I can only hear the hissing with my ear “on” the panel, which I don’t consider it as a problem anymore.
My vistas have been hissing for the whole summer when humidity is higher than 60 percent. Vacuuming doesn't help with this problem. So I thought the panels have got dirty again due to my non-ideal environment. Since last time I washed them in the shower and it was quite a bit of effort, I...
You can’t take them off. If you did then the panel is done. What you should do is to take the whole panel i.e. the front and back stator and the Mylar film together as a single piece into the shower. Clean it using a soft brush with Simple Green as best as you can. Rinse it as best as you can...
You can take it off for a shower, there are six screws in total you need to remove. 4 at the bottom and 2 behind the panel. Once you've got the frame off. You'll need to remove the tensioner nuts at the bottom and some screws on the frame itself. After that you slide the top struct off and pull...