(Topic ID: 125966)

DE Alpha-numeric Display issues, Replace or fix?

By Yoko2una

5 years ago

Topic Stats

  • 4 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by Yoko2una
  • No one calls this topic a favorite


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#1 5 years ago

So my son is playing my DE Simpsons the other night and all of a sudden there's a small pop sound and the alpha-numeric display goes dark. I turned off the game for a bit and unplugged it. On reboot, it seems as everything is working except the display. I played a few games to verify while my son cries thinking he broke the machine.

Because I can't go into any sort of diagnostic mode w/ no display, I tried to locate any blown fuses, but didn't see any. I was already considering a new X-Pin display because my bottom right character (last digit of Player 4's score) already had a broken connection pin, so if it's the display that's the cause, I'm all for replacing it.

I have a multimeter, so I'm wondering if there's something I can check coming into the display board to prove it's the display that's dead (and justify the new X-Pin display) or something on one of the other boards that's the root cause (which then will be the first fix, and then depending on cost will determine the X-Pin purchase after the fact).

Any help would be appreciated. I tried searching the forum with what I thought were relevant keywords but couldn't find another thread with the same problem.

#2 5 years ago

With that 'pop' I would first check the +/- high voltage supply that is feeding the display first. May have blown a transistor or driver on the P/S and you would still have a problem if you swapped in a new display.

#3 5 years ago

Popping can be a capacitor exploding. Pull the master display board and the power supply and give a good visual check for problems. See if any capacitors looks bulged or split open.

Do you have a way to test the MPU? Would hate to have you get a new Xpin display and turns out the MPU has an issue (MPU is probably fine though).

#4 5 years ago

Thanks @Pat and @barak. My biggest fear was that the problem lies somewhere before the display and getting a new display would be like getting new tires for a car with a blown engine.

I'll give everything another visual check tonight and see if I catch anything.

Quoted from barakandl:

Do you have a way to test the MPU?

Other than a multimeter, I have no other tools for diagnostics here.

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