New Life Games LLC
**Video Poker, Keno, Slots, 21** Gaming machines => IGT I-Game and Game King => Topic started by: gposing on January 04, 2021, 08:27:47 AM
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Not sure where to start but it all started with a coin out jam error. When I removed the CPU I found it had a green varta on the board with low voltage. So I removed it, cleared and keychip it. When it came back up I got even more errors. The open door M was on and the L (assume Logic) was flashing. I also had a meter disconnect and the coin out jam error was still there. So I installed a new varta, cleared and keychip, when I put the cpu back in to program no lights at all. I can't even get a keychip to work now.
Other notes
JCM no lights nor does it cycle
No Sycn is displayed shortly on monitor
2 of the I/O cards have led lights
Printer does have power
meters are disconnected and have a jumper installed
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Post a real good photo of the Varta area only with a photo near 1000kb in size.
Guys with a lot of experience can tell you if that board is any good and/or repairable.
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Is this a 3902 board or a 3903 board? check to see if U72 is removed ( right near the heat sink ).
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3903 rev B
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U72 is on the board
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Photo of Varta
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There is also a U69 onboard near the U72
Looking at mine, I don't have those ones.
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If you remove a Varta battery from a 3903 board then you also need to remove U72 or you will get an door open MCLB error.
Make sure your power supply is fully seated in the connector and check the +13VDC output voltage.
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is there an easy way to check the 13V output somewhere in the machine?
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is there an easy way to check the 13V output somewhere in the machine?
Just about any red wire and the cabinet with a multi-meter set to DC.
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That will be easy. Thanks
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Quick indicator is if your Machine Accepts $1,$5 panel is illuminated or not.
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I do have 13V of power. the side light where it says insert bills is working and I made sure there was 13v. Couple of new items. When I power it on there is crackling noise coming from the speakers. If I power cycle the machine two times in a row on the second cycle the front button panel light up. Also the jcm does not cycle when the power is on unless I remove the cpu.
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hmm...sounds like your power supply may be weak?
Disconnect the fluorescent lights, the printer and the bill validator.
We need to get the MPU to boot up first and back to displaying something on the VFD reel glass display.
All the other stuff we'll add -on one at a time by powering down, adding on something and then powering back up until the MPU does NOT boot up.
There you'll find the suspect unit.
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Quote: We need to get the MPU to boot up first and back to displaying something on the VFD reel glass display.
This is a game king. :Scratch-Head:
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Quote: We need to get the MPU to boot up first and back to displaying something on the VFD reel glass display.
This is a game king. :Scratch-Head:
hahahaha! ok ok the LCD screen then...I'm only human! :Tongue_Out:
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Yes it is a gameking. I will unplug all items and work backwards. Thanks for the help
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So I unplugged every cable from the backplane except for the power cable, both light ballast, removed monitor. Still no lights on the cpu. :duh:
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Ok so your power supply is good, that pretty much leaves the MPU as the suspect. It was working (well at least booting) until you removed and reinstalled the battery. I just wanted to make sure your power supply was OK before swapping the MPU.
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It did work after I removed the battery but I got more errors. I installed the new battery and I was able to clear it, but when I put the M chip back in no lights. Looks like I will have to purchase a new cpu board and start there.
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That's what I would do. You don't need a 3903 board though, a 3902 will work. The difference between the two is the 3903 has the telltale battery and the 3902 doesn't. You're actually much better off not having the battery so you don't have to worry about future leaking and corrosion.
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New CPU ordered. Fingers crossed.
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Ok good luck. Did your old varta battery show signs of corrosion? If so, that may have been what killed it.
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Well i got my new cpu and I have the same problem No power to the mother board. There is a red led on the mother board it never comes on. I did the same test with the new board. disconnected all wires to the mother board except for the power in the lower right hand corner. still no lights on the board. I tested the power to the board and I found 13v on it. my next guess would be the mother board or is there a fuse somewhere I am missing.
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The LED on the motherboard doesn't illuminate, but that doesn't mean the motherboard isn't the problem. It would be kind of unusual though. Check both the +13 and +25 at J13 on the motherboard. That's the connection from the power supply. Red wire should be +13VDC, Orange should +25VDC. There aren't any fuses on the 3902 motherboard. If the inputs to the motherboard from your power supply are good then I'd pull the motherboard out and inspect it for signs of damage, such as a burn trace.
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Problem solved. Bad mother board.
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:applause: . Did you see any visible signs of damage on it?
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No I did not.