I opened it up last night - nothing to lose I figured.
The + wire from the battery compartment goes the ON/OFF switch and from there on to the PC board.
The '-' from the battery compartment goes directly to the board.
Two wires come from the TRY ME button and both go directly to the PC board but in a different connection point than the On/Off wires. The made NO connection with the battery compartment wires, at least not external to the board.
Since the board can only get power from the battery compartment when the switch is in the ON position (at least that's the way that I saw it) I don't see how the TRY ME could work without the switch being ON.
Here's a confusing thought: If the wheel could run continuously when the switch is ON, when would it be stopped in order for the TRY ME button to activate it? Poorly worded I know.
I'll just keep it up front within reach and play one song at at time I guess.
The hazards of buying something used I suppose.
- walt