well, no real help yet from anyone,
But.
all ok
posted to local store facebook site, got an answe rin a hour or two, whichwas good, D1Store, suggesting asking water on surface- No, tried HDNI to another screen, and no, asked for combo buttons on device, as it is an ANDROID tablet- help said nothing in manual, of course, no pin hole to reset it either(?) could be wrong there,
SO- tried holding top two buttons down (ON and F1), 10+ seconds, tried turning on, no click sound or screen on so must have turned it off, tried that combo again
and VOILA- it is on again.
just dont know why the screen did not turn on.