OK stupid accident. It is OK now but i bet it would have recorded a nasty shock (which i am sure they do).
It was powered up and running fine when it slipped out of the leather holster and dropped directly onto the floor from table height directly onto one edge.
The screen was BLACK and if the power on button was pressed the backlight came on, nothing else... so something was working. I chose to leave it 10minutes... The normal Wakeup face activate switch did nothing.
The same happened 10mins later so i did the usual reset; power switch and front activate switch pressed together. I waited and up came the usual Logo but this time with red sparkles zapping all around it....and minutes later it was fine and my iPad is working well.
Is this part of the 'recovery' from shock boot, (i haven't done a full search but am just interested).
I have also sorted the rubbish leather holder that had become a bit loose.