If you've been following the adventures of gern you'll realize I'm not a smart man. Case in point: https://pinside.com/pinball/forum/topic/lw3-dmd-not-showing-anything-i-really-messed-up

However I think I'm very close to fixing my DE Batman. The 68v went kaput on the Power Supply... I saw the flash and everything! I replaced the 68v leg and I know have 68v! But when I test the DMD I get a jumbled flicker and then nothing. I've read the the R95 resistor is prone to failing. But it seems odd that the 68v and that resistor would go at the same time, right? Or perhaps that's my exact problem and I should replace it.

Between the Batman and the still not working LW3, 2/3 of my tiny collection is up on blocks. Any advice would be greatly appreciated!

R95 has now been replaced and no difference. The resistor I took out tested fine. I does look like I have some leaky caps at c1 and c27. Here's a pic of what I'm talking about.

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The caps weren't leaky and tested fine. There is a piece of tape under the caps that has yellowed and looks like corrosion. Still having the same issue with the DMD giving me a flicker when it boots up and then nothing. I did notice that the R95 resistor is very hot once I turn the machine one. I'm going to replace it later tonight. Would a failed R95 be getting that hot?

Thanks all for the advice. I will check out the cold solder joints that cody took the time to point out. Thank you cody!

On the r95 I clipped the resistor legs and soldered to those per pinwiki. But I did get carried away in making sure they were connected. The replacement resistor was supposed to be the correct one. .. I thought it looked odd being that much smaller! I should be able to snag the correct one here at work.

Thanks again for all the advice everyone!

I touched up the spots that cody pointed out. Unfortunately I don't have a spare 33k 1/2 watt resistor. I'll get a few ordered tomorrow. Since I'm putting in an order, is there anything else I could order that may need to be replaced on the dmd?

On the black connector all the voltages are within tolerance. I had the exact values written down but I can't find it at the moment. But all the voltages coming in on J2 look to be good.

My parts came in and I replace the resistor at R95 with the correct one. When I power up the machine I have the same problem. A bunch of pixels lite up then the DMD goes blank.

The red stripe on the ribbon cable is on #1 pin on both ends. I'm wondering if there is anything on the DMD board that could be the issue. I wish I had another machine to test it in.

I rotated and reseated the ribbon cables. Unfortunately it didn't make any difference. Gonna mess with the cables a few more times just in case.

I'm really thinking the issue is with the DMD board. I've swapped ribbons out to no avail. All the voltages to the DMD are fine. I'm thinking I need to find a way to test that DMD out.

Haven't had much time to look into this. I'm hoping this weekend I can do some testing on the dmd itself. Outside of that I'm not sure what my options are other than buying a replacement... that is if I can find one.

Not anyone that I know of. I'm part of a Pinball Facebook group though. I could ask if anyone on their would be willing to test my DMD in their machine.

I didn't have any luck via the Facebook group. I think they may have deleted my post asking for help... so that was cute. I'd be more than able to send the DMD out to someone to test if anyone was willing. If there is someone close to my location I'd also be willing to drive the DMD to you to test. I'm really just stumped by the whole thing since it went out so fast.

PinballManiac40, if/when you get some time I'd totally send the DMD out to you and pay for the return shipping.

The voltages from the Power Supply to the DMD all check out. I just checked them over and they were -111, -89 and 67. From what I've read they should be -110, -98 and 68. It does appear that my voltages are off but within 10%. But that now has me wondering if that is the issue.

I rebuilt the HV on the board and that's what got me to this point. So I must have mucked something up somewhere if the voltage is low. I have another power supply that should be on its way back to me soon that I can throw in there and test out. I should have enough spare parts to rebuild that negative high voltage leg though.

Thanks for the advice PinballManiac40. And thanks for the offer MustangPaul. Unfortunately the DMD for Batman is 128x16, so it's a bit smaller.

Don't I know it! If there is anyone close to me I'm all ears!

I got my power supply for my LW3 and put it back in and am without the negative voltages. So I can't use it to test in Batman. So it's looking like I'm going to rebuild the negative leg of the power supply and see if I can't get that -89 up to spec.

I replaced the 12v zener at d11. That is for the -98v leg according to pinwiki. I verified that the zener I replaced it with was correct and now am getting -23v and -1v where before I had -111 ando -89.

I feel like I'm chasing ghosts here. About ready to buy a new power supply board off eBay... anyone got any advice or should I just give it up?

Here's a few pics. If you'd like to see a close up of a section let me know.

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Lol. The board was messed up when I pulled it. But since it worked I thought it wouldn't be too bad to fix. I guess that's why it went up in smoke outta no where. It was surprising that it even worked initially especially when looking at the rectifier on the back. The front wasn't too bad but there were some lifted traces. I should have looked close at the boards before buying it... which is worrying considering where it supposedly came from.

I may try to clean it up more but it does seem that it may be a lost cause. Thanks to those that offered real advice and just didn't pop in to troll.

I got a replacement power supply in and the -98v is reading -87v. So I'm having the same issue with this brand new board. As PinballManiac40 pointed out that voltage seems a bit low. Is there any chance that I have an issue somewhere other than the Power Supply?

I also put the new Power Supply in my LW3 and the voltages measured exactly the same.

I just tested with only CN1 and CN2 hooked up and there was no change in the voltage output.

According to the guy who builds these boards the voltage is correct according to the parts specified on the board. I bought the board on eBay and the guy evidently makes the boards himself. I'm not sure if that voltage is ok or if it should be higher and that is why I have no DMD. But I do get the rom version on start up so perhaps that voltage is enough and I have an issue somewhere else.

I don't get anything when I boot the pin up other than sometimes I get a brief flicker on the DMD.

I started a thread in hopes that there is someone close to me that I can bring the DMD to and have them test it. Unfortunately I don't know anyone that has a machine with the 128x16 DMD.

I do!