Thanks for the replies.....The power switch was broken but inside the stereo....I used it to put the stereo in the the on position (this allowed me to get the decks to work)......runs off mains and batteries. It is basically on all the time if it has power now.
The only LED to light up is the "continuous play" LED. It will also go into HI speed when you flick the Hi speed dub switch.
Didn't notice any cracks in the boards or broken wires.
Pete.