Today my better half went to play some music and complained it does not work.
Upon investigation the 552 was off and this was because the power lead into the rear of the 552 PS is flakey. It really does seem very loose and causes the power to cut in and out.
I realise that the power connections are deliberately not a tight fit but this does seem a little crazy.
Have I not pushed it home hard enough I wonder but I don’t want to damage anything.