New Life Games LLC
**Video Poker, Keno, Slots, 21** Gaming machines => IGT I-Game and Game King => Topic started by: smoothgrh on January 12, 2018, 10:22:53 AM
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Hi!
My IGT Triple Play/Five Play 3902 board has a high-pitched hum during the main game screen that sometimes causes the machine to cycle the power—it'll shut off and initialize the system again. However, when I'm on a screen that's not as bright, like a diagnostic screen, the hum volume lowers and is unlikely to reset to machine.
When I return to the game screen, the hum noise increases again. What could be causing this? The brightness has no effect, as the hum is still there even when the monitor is completely dark. I also checked the motherboard chips to ensure they're seated properly (though I didn't check the chips under the multimedia lite sound board).
Here's a video of it: https://youtu.be/nGdzfdT6ba0
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Does your game have the old style tube monitor or LCD? If your not using the MMII board try removing it to see if the noise stops. You could have a power supply going bad too.
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Thanks Amechanic!
I have a CRT (with a new, working flyback!).
The multimedia lite board was my other question: it has only one sound EPROM in it, and not one of the plug-and-play chip boards. The menu has a sound test for digitized sounds, but there are no sounds to play. Should there be digitized sounds on Triple Play/Five Play?
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I'm wondering if you have more wrong with your CRT Chassis. Flyback usually don't just go bad. You could have weak or bad caps, video amp IC, something causing the noise. You need to open your game and try to isolate where the noise is coming from.
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If it uses SWC00046 EPROMs for sound there should be two of them. You can play it without any sound card installed and all the standard poker tones will work though.
I'd check the +13v and +25v outputs on the power supply too.
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I'm wondering if you have more wrong with your CRT Chassis. Flyback usually don't just go bad. You could have weak or bad caps, video amp IC, something causing the noise. You need to open your game and try to isolate where the noise is coming from.
It's not the flyback—that issue has been resolved.
I swapped out a 3902 board (Neon Nights) that worked fine, never reset the machine.
Now that I think about it, when I was using a Game King board, I was getting restarts.
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If it uses SWC00046 EPROMs for sound there should be two of them. You can play it without any sound card installed and all the standard poker tones will work though.
I'd check the +13v and +25v outputs on the power supply too.
Thanks Tilt.
I'll check what it's like without the sound card.
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OK, I removed the Multimedia Lite board. The humming stopped for a little while, then returned. However, the game never reset after that—so at least that's a good thing.
I decided to swap Neon Nights back into the machine, and it seems the high-pitched humming comes and goes, so likely the problem isn't specific to that game?
I made a video of Attract Mode for Neon Nights: https://youtu.be/nqH_v_Z3FzM
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When you say swap to Neon Nights do you mean you changed the game software on the MPU board or used a different MPU board with Neon Nights on it? If it's the same MPU board then it could be the problem, but I'd check the power supply voltages first.
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When you say swap to Neon Nights do you mean you changed the game software on the MPU board or used a different MPU board with Neon Nights on it? If it's the same MPU board then it could be the problem, but I'd check the power supply voltages first.
Oh sorry. I used a different MPU board. Different trays.
It'll take some time before I can check the voltages, but I'll report back when I do!
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That would eliminate the MPU the as the cause then. Yeah, check the +13 and +25 VDC outputs and see what you get.
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In a different thread, I posted that I was having the same problem with the game resetting.
I'm nearly positive that the Multimedia Lite sound board causes the problem!
In both MPUs, Triple Play/Five Play poker and G0001777, when I removed the sound board, the resetting stopped!
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Problem NOT solved!
I let my game run for awhile without the Multimedia Lite sound board, and eventually the high-pitched hum returned, then I got power cycling again. :fryingpan:
So, I think it's the MPU board in general that causes the resetting. I put back in the original MPU, and it has not power cycled. It's just some MPUs that cause it. Others work fine.
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Another clue. It seems like the high-pitched hum is at its loudest when the front button lights are on. It's less loud when the CASH OUT and BET ONE lights are off. The hum goes away when on the diagnostic screen because all the lights are out.
This humming is more prominent on some MPUs than others, but only two of my games cause resetting and power cycling.
I know—I should test the power supply voltage. I'll need to enlist some help on doing that!
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smoothgrh, your pm box is full Jim
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OK, I bought another 3902 MPU, and removed the Triple Play/Five Play chips from the old MPU and put them into the one I just got.
When I first turned on my Game King, it power-cycled a bunch of times, so I turned it off. I noticed that right before it reset the final time when I turned it off, it briefly flashed the "System Initializing" screen.
So I thought, "if I just let it restart a bunch of times, will it eventually get to the game screen?" So I turned it back on and let it power cycle a bunch of times like before, but it eventually did load the game. I played it, and it was fine. And no high-pitched humming!
Later, I turned it off, and then turned it back on. It loaded immediately—no problem!
So maybe the MPU is wonky? Or could the chips be wonky? It's a Frankensteined set. The GME chips are copies, the PXL chips are from IL, and the CG2 chips are from MS.
I'll try putting a different game into the old MPU, and see what it does.
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Another update:
This morning the power cycling returned upon startup. However, after the game started, it stayed on—no more power cycling. It seems like it needs to "warm up" before it'll work. And no more high-pitched hum: https://youtu.be/4S7SHv9auHo
I put a different slot game into the MPU that came with Triple Play/Five Play, and there's a slight hum, but not anywhere close to the original hum: https://youtu.be/1ZauSPMaxR4
My latest guess is that the power cycling is because of the game chips, and the high-pitched hum is a combination of the MPU and that Frankensteined set of chips.
I hope my thread can help someone—though I don't wish this situation upon anyone!
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Two words. Power Supply.
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Two words. Power Supply.
Tilt,
Haven't you got the hint? I'm avoiding the task of changing the power supply! :fryingpan:
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But seriously, this power cycling issue happens only with two specific game sets.
I'll keep collecting observations while I avoid changing the power supply.
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OK, whatever keeps your :CaptainHappy_worried: a float. You could check the output voltages though, you've had a year to think about it :24: :24: .