(Topic ID: 223308)

Help! DMD acting up

By PinballT

1 year ago

Topic Stats

  • 16 posts
  • 5 Pinsiders participating
  • Latest reply 1 year ago by PinballT
  • No one calls this topic a favorite


Linked Games

Topic Gallery

There have been 7 images uploaded to this topic. (View topic image gallery).

E527A914-8C7E-42EB-A739-CAB284884D50 (resized).jpeg
977D77E9-5EE5-419A-90A2-DB9ADE439495 (resized).jpeg
102_3473 (resized).JPG
102_3471 (resized).JPG
102_3466 (resized).JPG
102_3469 (resized).JPG
102_3470 (resized).JPG

#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!

102_3466 (resized).JPG102_3469 (resized).JPG102_3470 (resized).JPG102_3471 (resized).JPG102_3473 (resized).JPG
#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?

#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.

977D77E9-5EE5-419A-90A2-DB9ADE439495 (resized).jpeg
#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

E527A914-8C7E-42EB-A739-CAB284884D50 (resized).jpeg
#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://www.PinWiki.com - The new place for pinball repair info

#16 1 year ago

Thanks so much Chris!

Promoted items from the Pinside Marketplace
$ 279.95
Lighting - Led
Pin Stadium Pinball LEDs
From: $ 40.00
Lighting - Interactive
Professor Pinball
From: $ 40.00
Lighting - Interactive
Professor Pinball
Machine - Wanted
Hesston, KS
From: $ 99.99
Cabinet - Other
Lighted Pinball Mods
$ 259.95
Lighting - Led
Pin Stadium Pinball LEDs
From: $ 129.10
Cabinet - Sound/Speakers
Machine - For Sale
Lizella, GA

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside