Analogue-sequencer

Blip,

> > To prove which it is remove one end of D6 (PSU diode IIRC) and measure
the
> > voltage of the regulator, both input and output.
>
> hmm... it doesn't matter which, i'm assuming?

nope, either will do.
It just stops the voltage going to the rest of the main PCB.

assuming disconnecting the diode makes the regulator spring to life try
this;-

Turn off,
Remove ALL the IC's and ALL connectors (lcd/switchs/etc)
Turn on, check regulator output.
Assuming its ok, turn off
Insert one IC,
Turn on,
check voltage,
assuming its ok, turn off,
insert another IC

if you manage to put in all the ICs and it's still ok, next plug in the IO
boards, one at a time again.

I hate to say this but, are all the IC's in the correct way round, I know it
sounds obvious, but I've done this myself.
Also check to make sure that the PCB isn't shorting against the case
anywhere, if possible test it on a wooden work bench or something.

Paul