> > > > Hi everyone! First post here!
> > > >
> > > > I recently bought a bundle of Jamma boards, with those came a MegaPlay
> with
> > 3
> > > > carts and a System Multi 32(huge beast!).
> > > >
> > > > Can anyone give me any aditional information or manuals for these PCB's?
> > > > The MegaPlay has about 9 sets of conectors which I have no idea what they
> > are
> > > > for!
> > > > The MegaTech used a 2nd monitor, does the MegaPlay also use one?
> > > >
> > > > The MegaPlay board worked fine when I first tried it but after I swaped
> the
> > > cart
> > > > order it stopped working! It powers on but doesnt boot the game, the
> screen
> > > just
> > > > stays black.
> > > > If I remove all carts I get to some sort of BIOS screen which says 'insert
> > > > cart'... Any ideas?
> > > >
> > > >
> > > > About the System Multi 32, can I run it with just one Jamma harness
> conected
> > > or
> > > > do I need to connect both at once for it to work?
> > > > Also, what are those optical terminals and that weird port between the
> jamma
> > > > harnesses for?
> > > >
> > > > I hope you guys can help me out...
> > > >
> > >
> > > try making sure the cartriges are inserted properly as the this can stop
> games
> > > from loading. also try cleaing the contacts with a cotton bud with a small
> > > amount of water as this does get games working. this also works on neo
> > > geo/megadrive/master system an other cartrige based hardware.
> > >
> > > the megaplay hardware only works with megaplay games and not megadrive
> games.
> > >
> > > hope this helps
> > >
> > > retromad2
> > >
> >
> > That was the first thing I did, both the slots and carts are clean, they are
> > MegaPlay carts.
> > Because I didnt have the select button wired and I wanted to change game I
> > powered off the board and swapped the order of the carts.
> >
> > It never worked again. Seems as it doesnt find the BIOS on the carts, however
> it
> > goes to the internal 'insert cart' screen if no cart is inserted.
> > I tried removing the battery hoping that it could clear the internal memory
> and
> > solve the problem but I had no such luck.
> >
> > I remembered one thing, my setup doesnt have the -5v connected, anyway it
> worked
> > before without the -5v so that shouldnt be the problem I guess...
> > -5v on the harness is normally used to power the audio amp, right?
> >
> try one game at time
>

Already did... each cart at a time, two carts, 3 carts, puttin in random slots, etc