No, I haven't seen any evidence of that. The screen's bright and clear; there was no wobble at all, as far as I could tell. If a deaf man were to start up the Plus, he would perceive nothing wrong.

I can certainly do what you said about re-tightening the grounding screw. I'll turn the Plus on again probably tomorrow, so then I'll be able to see if the fizzling persists and if so, take some action.

Very interesting, Gil...yeah, my problem is definitely similar to yours, in the sense that what's displayed determines the sound. When I first started up the Plus--you know how Pluses activate the CRT upon startup only briefly, then the screen shuts off and then comes back on with the icon? The fizzling sound was only there while the screen was doing its shut-off thing, but the moment it came back on, the fizzling disappeared.

But your problem seems to point to components on the boards rather than the actual CRT, since only the circuit board(s) determine what image the CRT actually displays. I might have a closer look at that analog board once I open the Plus up again.

I'll see if I can find that youtube video of this same problem...in rare cases, the people who post comments actually know what they're talking about, rather than the usual "ur computer's so old! lol" type of statements.

-Apostrophe