[philbuck]

Hi Hans, thankyou for replying.

I have removed both cameras, one at a time, powered up and down, with no difference.
I have swopped the cameras over, with no difference.
My computer will not access the SD card in the unit, although it does power it up, (or at least, go thru the light sequence I described earlier)
I have tried several 8Gb cards, none of which make a difference.
If I hold the front grey button down for any length of time, it just turns the unit off (well the lights go off)
Holding the button again, appears to turn it on (well the lights come on……… red, then solid green………as before)
Without the card being seen, I cannot change any firmware.
No further forward I’m afraid……………