Recently, I needed to change the batteries in my old Newton MessagePad 120, but once I had put in the new batteries, the Newton wouldn't go on.
Any Newton owner probably knows the quiet but high-pitched "wail/squeal" that comes from a Newton when it its on. Sometimes when I tried to turn on the Newton, it would make this noise, but not continously, at about 2Hz. The screen would stay blank and it has nothing to do with the contrast adjuster at the side (a source of many previous panics).
Could this just be something to do with the small button cell (I think it's the original one) that's in the battery place, or is it something more serious?