(Topic ID: 223308)

Help! DMD acting up


By PinballT

1 year ago



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  • 16 posts
  • 5 Pinsiders participating
  • Latest reply 1 year ago by PinballT
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#1 1 year ago

I just got a Family Guy (Which I love) and the DMD is acting weird. It has dots appear randomly in the same area and sometimes its like 4 or 5 dots and then maybe 1 or 2. I tried different DMD and changed with a brand new ribbon cabe. Still not difference. I am thinking something with the power but don't know where and how to start. Any advice would be much appreciated!
Thanks,
Tom

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#2 1 year ago

Power off. Try reseating any ribbon cables involved, both ends. Be sure all ICs are pushed in tight.

LTG : )

#3 1 year ago

Hi Lloyd,
Thanks so much for advice. I tried resetting all ribbons, tried new ones and still same result. When you say ICs, your talking about the ends of the ribbon cable?
I am at a lost right now. Generally replacing or flipping the ribbon cables work for me but not this time. Any other advice?
Thanks,
Tom

#4 1 year ago
Quoted from PinballT:

When you say ICs, your talking about the ends of the ribbon cable?

Integrated Circuits in sockets on boards in the head.

LTG : )

#5 1 year ago

Checked everything. I even update the rom again and the same result. It was happening before update so don’t think that is issue.

#6 1 year ago

The strange thing is during update, it was constant and then afterwards it happens very few changes in dmd screen.

#7 1 year ago

Sometimes it will go horizontally but mostly vertically but always the same row or line.

#8 1 year ago

I would email Chas at Stern.. he figured out my DMD problems to one of the power boards... they will get back to you and give you troubleshooting

#9 1 year ago

Seems like a RAM issue, but unsure where it would be at on this game.

#10 1 year ago

Can you run the display test and let it go through a complete cycle? Wondering if there is a page error (RAM) failure.

#11 1 year ago

2 dots just blink on test mode.

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#12 1 year ago

Tried the dmd test again and it is like 7 that blink now.
What is Chas at Stern’ email?
Thanks! Tom

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#13 1 year ago
Quoted from PinballT:

Chas at Stern’ email?

Tech Support is on Stern's website.

LTG : )

#14 1 year ago

Thanks Lloyd! I just emailed them.

#15 1 year ago

That’s a RAM issue Tom. Let me have a look to see what/where the part is.

Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info

#16 1 year ago

Thanks so much Chris!

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