[Gofer]

Peter, from what I can see from the picture on Express Model's website there's not a lot you could possibly get wrong with that unit. It appears to a pairs of terminals for the AC in and a pair of terminals for the DC out. Not wishing to attempt teaching my grandmother to suck eggs but I presume you've connected the LEDs with the polarity correct? I think dbclass50's suggestion of proving an output from the unit with a meter or whatever does seem to be the best way forward.

 

[Gofer]

Peter, I've just read my post again and must apologise for the lack of lucidity

but you obviously got the gist of it.

From your last post I don't think there's much doubt that the unit is defective - smoke being the clue!

. I don't reckon you've much choice now but to send it back to Express Models for repair/exchange. Any idea what sort of load you had connected to the DC output?. The only reason I ask is because about the only thing on that board that is remotely fragile is the fixed voltage regulator itself (the bit the heat sink is fitted to), and even these are fairly indestructible being that they usually have an integral overload protection.

Steve