(Topic ID: 236869)

Color DMD issue....help


By Yesh23

8 months ago



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  • 14 posts
  • 7 Pinsiders participating
  • Latest reply 8 months ago by PinballManiac40
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2019-02-02 14_20_45-WPC ribbon cable to reseat - Paint (resized).png
IMG_4015 (resized).JPG
IMG_4014 (resized).JPG

#1 8 months ago

Curious what could cause this issue with my color DMD in my Dracula. It has been working perfect and I turned on the machine and I'm getting lines with no color. I've reset the cables but it didn't help.

IMG_4014 (resized).JPGIMG_4015 (resized).JPG
#2 8 months ago

Nearly guarantee you your problem lies with your DMD Controller behind the translite. Did you reset the cable on that side?

#3 8 months ago

Communication problem between the MPU and video RAM on the DMD controller board. To confirm, try running a display test from the game menus to the end and you'll get a report on reads/writes to the video RAM.

Can usually be fixed by reseating (or replacing) the two wide ribbon cables that run from the MPU to the DMD controller board.

#4 8 months ago
Quoted from Yesh23:

Curious what could cause this issue with my color DMD in my Dracula. It has been working perfect and I turned on the machine and I'm getting lines with no color. I've reset the cables but it didn't help.
[quoted image][quoted image]

I'd try re-flashing the colorDMD.

#5 8 months ago
Quoted from Dmod:

Communication problem between the MPU and video RAM on the DMD controller board. To confirm, try running a display test from the game menus to the end and you'll get a report on reads/writes to the video RAM.
Can usually be fixed by reseating (or replacing) the two wide ribbon cables that run from the MPU to the DMD controller board.

Ribbon cables swapped out and I still have the same problem. I ran the display test and came back PAGE ERROR BK (1) O 12. It’s hard to tell if a K and D because of a line thru it.

#6 8 months ago
Quoted from vireland:

I'd try re-flashing the colorDMD.

How does one re-flash the Dmd? I’ve always got games with the color in them and never installed one. Thank you

#7 8 months ago

Are your ribbon cables correct, sometimes the ribbon can be flipped and installed wrong. Just a guess.

#8 8 months ago

Don’t reflash the ColorDMD. It’s not the problem and not in the link that’s causing the page error.

If you have another WPC game, next step is to swap the DMD controller boards to see if the problem follows the board. It could be a failed video RAM or a bad header connection. More commonly it’s the RAM.

On the MPU it could be a poor socket connection at an IC or bad header connection.

It’s usually a ribbon cable or the video RAM.

#9 8 months ago
Quoted from heni1977:

Are your ribbon cables correct, sometimes the ribbon can be flipped and installed wrong. Just a guess.

They are correct because it was working perfect then I turned it on and got this

#10 8 months ago

If you have another dmd board swap it and see if the problem goes away

#11 8 months ago

This is the ribbon cable that normally causes that issue. Sometimes it takes reseating it 2 or 3 times at each board connection to clear it up. 2019-02-02 14_20_45-WPC ribbon cable to reseat - Paint (resized).png

#12 8 months ago
Quoted from PinballManiac40:

This is the ribbon cable that normally causes that issue. Sometimes it takes reseating it 2 or 3 times at each board connection to clear it up. [quoted image]

I couldn’t THANK YOU enough. That did the trick and you made it easy for a rookie with the picture. This community rocks!!!

#13 8 months ago

Picture is not as good as what zaza comes up with, but I plan on working on it a bit.

Play ball !!

#14 8 months ago

Just FYI... This same issue would have popped up if it had an original orange plasma display.

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