Er, what exactly is this 46 volts supposed to be doing? I doubt there is
anything like 46 volts anywhere near the keyboard.

Please try again.

Gareth.

Yes... I checked it again. it's a common to all keys. No... there's
little chance of electric shock, as there is a lot of plastic between
the user and the switches.

Sorry for jumping to conclusions. It's what I do, sometimes.
And... as you will know, aluminum electrolytics are prone to going dry
given a few decades (or less) !