Have you installed new ribbon cables yet?

I personally would just order a full new set, they are usually original and now 20 years old, I know you used to be able to get the entire set from GPE, it was not bad for the set..

Glad to hear the cables worked.. I kinda had a feeling that would do it..

After I posted telling the OP to get a new set, I ordered 2 myself, BEFORE they started acting up..20 bucks from GPE is not bad, an extra 4 for the aux cable for Demo..

Have you reseated all the game roms?

I wonder if after that rebuild of the HV section your voltage is too high, did anyone confirm the voltages were correct since you posted what it was out putting?

Yet they were working fine for a little bit with the new cables? Are these displays still working correctly in other machines?

The second one looks like it is pulsing with that distortion, the first one is a complete mess.. but voltages tend to have different affects on different displays.

I am no master at all on the electrical side of the coin.. but I have a 100% working demo man here, so I just took some readings on my dmd, 3 of the lines have voltage, the highest was 143.9, however the pin next to it is showing 27.6, the 3rd is 10.3.. I know you have one reading at 116, where exactly is that reading coming from?

Same reading when I check voltages on the display driver board.. 143.9, 27.6,10.3

That is exactly what I did. My display is perfect, not a speck of issue at all

Interesting as mine are 143.9 and 27.6.. I know the 27.6 is below where it should be, but I have no issues on my display at all.. what are the correct voltages at these 2 points?

0 on ohms.

I think I had my meter on the wrong V side.. Readings are coming out more accurate.. I did say I have a tiny bit of knowledge on this stuff... so there you go.. will post new readings in a min.. also just found out I was sold a DMD that I never bothered to test and it has 6 lines out, if I squeeze it together a few come back.. any idea how to repair, I know that is the internal ribbon cable..

Ok

1 -120.4
2 -108.4
3 0
4 0
5 0
6 5.0
7 12.7
8 64.5

Voltages going to the DMD itself based on connection at DMD

Starting left to right, first connection orange

-121.6
-109.4
0(no connector pin here at all
0
0
5.0
12.8
64.8

Maybe these will help the OP.. and I learned something new as well!

Unless he made the same meter mistake I had made.. he was saying 138 and 116, now assuming he did not put the - in front of the numbers, they are high, but when I had the meter set to the wrong side mine were up there as well...

I cannot even figure out how you could separate this dmd to repair the internal ribbon cable.. I should have tested it, took sellers word they were both good, one was perfect, this one is useless..

You did the rebuild of the board BEFORE you got the new cables in right? I am just wondering if something was done wrong on that rebuild..

Were your voltages -138 and -116?

I think those initial display issues were cable related..

Try to find someone local who will let you try the babcock display in their game.. If the Vishay display is working perfect, you should be ok.

His customer service is fantastic... you will get it back quickly, I had a problem with a few of his boards, one came with a game I had bought, it was already installed, told him the problem, had me sent it to him, and sent it back no charge... never even asked where I got it, how old it was...

I recommend him for the service alone!