Strange hang on power on

This happened to me a while back but hasn’t since, until again over the weekend. Both times I’d taken my MD away from the studio to work on it solo style and when I powered it up, the machine hung on the boot screen (the one with the logo & OS number).

When I switch it off and plug in a midi cable, it then boots up fine. Silly question but, is this normal? Seems very odd. Anyone else experienced this?

Is my MD sick? :dizzy_face: