Hi guys think i've tracked down the problem.
There is a 555 timer on the board that resets U1 and U2 it looks as though it is set up in astable mode and should be running along happily switching its not running at all so i replaced the 555. No go
I'll replace the caps next but i don't have any spare 0.1 uF 100v polyesters handy.
I was however able to trigger the 555 by grounding pin 2 and then able to watch the reset line change state and then able to play sounds again.
So off to Jaycar i go.
Cheers
Wally
