Frozen SX GA1

[The Organ Grinder]

Loaded a Rhythm from Floppy Disc, all seemed fine, as usual the word "completed" came up on the display when it was loaded but I noticed none of the registrations changed and the word "completed" remained on the screen (it usually disappear's ) and the Organ Froze. Have switched it off and on again, all this has done is remove the word completed from the display and replaced it with the graphic of a set of organ pipes, this always appears when power is switched on and is followed by another graphic, this one is of an organ descending.
Has anyone else experienced this and is there a work-round for it?
Den