I'm having a very frustrating issue w/ Maverick. I have one of two options...I can either bang my head against the wall hoping that the vibrations from the wall will magically fix this once & for all. Or my next to last option would be to contact the excellent community at Pinside, w/ some knowledgeable insight to remedy this situation. Anyhow, I believe (99%) that I have an overheating issue somewhere within the machine. The problem seemed to manifest after playing a game & the first drop target underneath the Lauren Belle was wedged. This prevented the whole row from resetting back into place. Of coarse I replaced the broken drop target, then very strange things started happening within the machine. Initially when starting the machine, then playing a game or two ~ approximately after a half hour or so the machine gradually starts "acting up"...
1. The relay that controls the Lauren Belle starts clicking gradually, then gets progressively worse.
2. Then the underneath playfield lights blinks uncontrollably. As the relay clicks clicks.
3. After a minute or two the DMD flutters, then blanks out.
4. During a game when this problem arises, the Lauren Belle will "toot" gradually then becomes progressively worse. As the Lauren Belle "toots", the DMD will only show that image of the boat.
Here is what was done so far as to try to fix the issue...
1. The resistors in the MPU were replaced. The original resistors had a chalky residue.
2. The voltage regulator in the power supply board was replaced.
3. The rectifier in the power supply was replaced.
4. All the caps in the power supply were replaced.
5. The relay board that controls the Lauren Belle was replaced.
Any advice would be greatly appreciated!!!

Now that's thinking outside the box! Though more than half of the power supply board was replaced, would you recommend starting there? Or mabey The MPU board? Or possibly the rectifier that controls the DMD 18 volts just below the power supply board?

No, nothing of that sort was replaced. Correct me if I'm wrong, but what you stated might make sense if the problem were to happen at machine start up. Rather the issues are an incremental build up to DMD shut down. This usually takes place about 45 or so minutes. The machine plays perfectly ~ then all "dog" breaks loose.
Thank You Tom!

Thanks to both of you for your prospective insight. I did however look underneath the playfield to see if possibly there might be a pinched wire or metal on metal contact. Though my trusty pinball spot-light went out, due to a light bulb that had enough, I was able to see barely that this doesn't seem to be a short issue. Yes no doubt, I will replace the pinball spot-light bulb this weekend, & do a little further investigating. But there is an outside chance this could be the culprit. The freeze spray scenario sounds very promising, & will definitely give this a try. What a great ideal ~ & only from the excellent folks at Pinside!!! Thanks guys, I'll respond accordingly.

Once again, at machine start up & for the first game or two everything is functioning perfectly as it should. Shortly thereafter the machine goes into a spiral decline. So while the machine is functionally sound, as is the voltage. But once the heat up occurs, I'm sure the voltage readings are all over the place. So the voltage output would be just a residual effect of the main problem.

Yes the CN1 connection was checked & is looking as it should. As are the other connections ~ they also were thoroughly checked about a month ago. I did however order a can of electronic freeze-it spray via E Bay, & once that arrives, that should pinpoint the problem. If not, then checking the voltage will be the next option. If there is any more advice, that would be greatly appreciated.

I had the opportunity to use the freeze spray last night, w/ nothing gained. I sprayed virtually the entire Power Supply & MPU Board, w/ no fluctuations in machines performance. My next objective is to order a new Power Supply Board. I purchased one on E Bay ~ ($75 + free shipping) ~ & it should arrive by Friday at the latest. I'll respond w/ an update & keep all informed w/ the outcome.

Sorry it took a while to respond, but in a perfect world pinball would come first & everything else thereafter. I did receive the Power Supply Board & installed it within the machine. Though I was pleased w/ the results the verdict is still out. The board did remedy the relay & underneath playfield light issue. But after approximately an hour I lose the background music, then shortly after the DMD goes blank. But to solve the DMD issue, I have ordered a Cable Wire Harness Update Kit. This kit will improve the efficiency with which the harness supplies current & voltage to the Large DMD (192 x 64). If anyone is having similar problems, Google the following ~ Sega harness update kit (500-6326-00). This installation kit is of coarse compatible w/ All Four Large DMD Sega Machines. Though this is a slow process, I will post another update after which the kit is installed.

As of last night, I have installed the Sega Harness Update Kit successfully , w/ nothing gained. The backround music is still going silent after one play, & the DMD still blacks out. But I have contacted my good friend Marlin Barshinger, & he has insisted to install my DMD in his Frankenstein machine. For those of you who don't know Marlin, he is the one of the original founders of the York Pinball Show, as well as an almost 30 years pinball technician. Anyway, at least this will narrow down the cause. At this moment, my guess is that the capacitors in the DMD need replaced ~ but we'll see...? I hope to see some of you at the York Show this Friday. It's going to be awesome as usual! Once again, I'll keep all informed of the progress either way.