Hi Tony,

Actually, I don't think it is a hardware problem with the button.

I've swapped the now playing button with the standby button, and the now playing button still works, but the standby one is still broken.

It doesn't therefore appear to be a mechanical issue with the button itself, but a electronic problem somewhere on either the button board (unlikely, given the low component count) or the LCD board.

The standby button works fine when the button board is tested in isolation, but not when it's connected to the LCD board. Weird!

Andy.