On Sunday, February 10, 2019 at 3:34:28 PM UTC-6, Jose Carlos Lucas wrote:
> On Sunday, February 10, 2019 at 5:46:11 PM UTC-2, LexingtonVAPin wrote:
> > On 2/10/19 12:14 PM, Jose Carlos Lucas wrote:
> > > On Friday, January 25, 2019 at 11:59:36 AM UTC-2, LexingtonVAPin wrote:
> > >> On 1/24/19 10:05 PM, Jose Carlos Lucas wrote:
> > >>> Em quinta-feira, 11 de janeiro de 2018 04:01:55 UTC-2, DomaineR escreveu:
> > >>>> On Tuesday, January 9, 2018 at 12:23:17 PM UTC-8, Jose Carlos Lucas wrote:
> > >>>>> Hello,
> > >>>>>
> > >>>>> I have MM and had a problem with DMD, not displaying anything. HV section of the WPC-95 A/V board was rebuild and I have all tensions ok on the DMD, -116V; -104V; +5V; +12V and +65V all good. The DMD was tested on another machine and works without any problem. The machine starts the game, I can hear the sound and play normally but nothing is showing on display. Anyone have some tips? If need any more information, just let me know.
> > >>>>>
> > >>>>> Thanks.
> > >>>>
> > >>>> I would check your voltages on the dmd board and down a trace away from the pins. My mid 90's pins are suddenly getting all sorts of cold solder joints and in places not directly 'in the line of fire'. While it wasn't surprising in the saucer board on an AFM, it was on some driver boards components (non connector) on a TOM
> > >>>>
> > >>>> Also, not a bad idea to see if you can borrow a dmd from another machine. But that is often easier said than found.
> > >>>
> > >>> Hello, I tested the display on other machine and works fine. Tested other DMD on the affected machine, but still no video. The only thing that happens is when the machine powered off the display show some lines than off.
> > >>>
> > >>> Thanks.
> > >>>
> > >>
> > >> Did you try switching the ribbon cables with another pin? The ribbon
> > >> cables involved are those going from the CPU to the DMD controller, and
> > >> the ribbon cable from the DMD controller to the DMD itself.
> > >>
> > >> Also be certain that the ribbon cables are plugged in properly. I find
> > >> that it is frustratingly easy to get a ribbon cable off by an entire
> > >> row. And I had a pin where someone had substituted a non-standard
> > >> ribbon cable that had more positions than the correct one, and I was off
> > >> by a column.
> > >>
> > >> It would be nice if you had another WPC95 around where you could switch
> > >> out boards to troubleshoot.
> > >>
> > >> --
> > >> http://orcalcoast.com/
> > >
> > > Tested on other machine and A/V board and cables are 100%. The problem is on CPU board, already replace the U2 74LS244N, but still no video.
> > >
> > > Thanks.
> > >
> >
> > Just to clarify, you tested the A/V board and all ribbon cables on
> > another pin and they all work? Or, conversely, you switched the CPU
> > into a working machine and still no DMD?
> I tested the CPU and A/V board on another working machine. The tests were, with a know good CPU board my cables, my A/V board, and DMD, working 100%.. With my CPU board no video on DMD, with my or other DMD also tested with another A/V, still no video.
>
> Thanks.
I'm having a similar problem on my Medieval Madness. Did you ever find what the problem on the CPU was?