This outfit appears to sell the schematics you need:

http://www.electronix.com/catalog/de...Path/12_49_201

BTW, do you have the speakers which attach to the sides of the monitor? I
just picked up a used monitor w/ the speakers, but no ac/dc adapter for
the speakers. The polarity needed is indicated on the underside of one of
the speakers, but not the voltage or mill-amperage rating. Can you
assist?

Robert