This is whats on screen, The brighter bands are actually just one white and grey band. The vertical band to the right is bad pixels on the screen.

The multicoloured LED doesnt come on when the reset button is pressed. But it did come on a couple of times when I was checking voltages.
The three pin 6.5 MHz crystal is oscillating, but the 12 Mhz doesnt seem to do much.
I havent soldered the capacitor to the bottom of the board yet.
I had problems getting a 1UH inductor. Finally found this one which seems a lot bigger than the one shown in the manual - I did resolder the top and get 5V at either leg.

Spec is 1uH 10% 4.45A 200Mhz - Farnell 2475028
I checked that there was 5V at the top-right pins on the ICs. All around 4.98V The Z80 pin 6 shows a frequency and Pin 34? shows 5V which drops and comes back up on reset.
Any advice or ideas about what has gone wrong will, as always, be gratefully received.
Meanwhile, I'll go over the board to check soldering etc.
Dave