New display issues on Stern AP

[b1807]

I tested a DMD from another machine ( not for the first time ) in AP.

 

It worked, as did the AP when I turned it on to check.

 

Thinking I had ribbon cable issues on the other machine, I have removed and saw the connections were wrong ( thinking of swapping them into other machine to test) so put them back.

 

Machines off when doing this.

 

Now AP displays Norma boot up sequence for first screen, see attached

 

I was then getting a message saying “51 balls missing�. Now I’m getting the rubbish as in the photo.

 

Now while sitting here typing this, it is scrolling through these screens

 

It plays normally, but there is no gameplay scoring shown. The only screen that appeared was one saying at end of ball 2x 20,000000 , and it stayed on

 

During gameplay, whichever of the screens is currently displayed, remains on for the duration unless you get something special, like the replay I scored, then that stayed on screen.

 

suggestions?

[Gemini2544]

Have you tried a full factory reset and start new?

 

[b1807]

Have you tried a full factory reset and start new?

 

Tried that. Fuses ok.🤷�♂�

[b1807]

Follow up

 

I have tested the U3 chip ad found the a leg on it not generating around the .05 that the other legs generate on the DMM.

(This is my research suggested)

I also tested the U201 it seemed fine.

 

While I’ve researched a fair bit and self taught how to test,I believe this could be the issue

 

Opinions.

[b1807]

Have also found similar errors on U8 and U9,

 

The parts list is vague on helping me understand what I looking (see photo).

 

Can anyone tell me exactly what type of replacement I am looking for, for U3,U8, U9 please?

[Gemini2544]

I'd just send it in to @Skybeaux you'd have it back by now fixed. He better equipped to do these types of PCBs.

[b1807]

I'd just send it in to @Skybeaux you'd have it back by now fixed. He better equipped to do these types of PCBs.

 

While skybeau did a great job on my high voltage board from another machine, we have discussed this board.

 

 

Still looking for replacement chips though. 😊

 

[Boots]

Have also found similar errors on U8 and U9,

 

The parts list is vague on helping me understand what I looking (see photo).

 

Can anyone tell me exactly what type of replacement I am looking for, for U3,U8, U9 please?

 

The parts list has a description and says what they are????

Not sure what info you are after?

U8 is ram

 

[b1807]

 

The parts list has a description and says what they are????

Not sure what info you are after?

U8 is ram

 

The parts list above from the manual is incomplete. Part numbers for what I’m chasing are not finished.

 

Looking for part numbers / type of chip required for U8 U9

 

or the equivalent…

Edited June 28, 2021 by b1807

[Boots]

 

The parts list above from the manual is incomplete. Part numbers for what I’m chasing are not finished.

 

Looking for part numbers / type of chip required for U8 U9

 

or the equivalent…

 

I am not sure how much more info you want, it says it right there