HP 50G Zero Key Registers On Release

[DavidM]

Like Günter and Bob, my 0 key registers the same as the other keys. I even tried a full memory clear just to see if resetting the status of the system would make a difference. It didn't.

The ON key, on the other hand, sounds a beep upon release. But it actually performs an interrupt as soon as it's pressed, despite the timing of the key click.