Just got my tc electronic Staccato 51 amplifier head working properly again.
1) a temporary power stage outage.
2) memory buttons sticking on one of the MEM options and refusing to revert to the standard Rocco setting at power up.
3) a longer power stage outage. (Line Out, FX Loop and headphone socket still working.)
A reset. i.e. Power up whilst holding down all three MEM buttons.
Be seeing you.