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Video Game Repair/Namco 81 MsPac / Galaga


I have a computer client who also has the above machine from Chicago Gaming. It's stuck on testing rom, then it flickers, beeps and repeats. The PCB on the machine isn't like most others I have seen on the web. These seem to be Rev 1.04 and have actual removable ROMs. The readout on his monitor says the game version is Rev 3.0. I have attached a copy of the PCB image from Chicago gaming website. It has 4 buttons on the board. Reset, Test, volume +-.

Labeled numbers: PG15-11667 or a six..can't tell P615-11667

All of the chips on the board seemed soldered in place and there is no removable Rom chips.

Any idea on how to fix this issue or is the PCB simply shot?

Also, can we simply replace it with one of the 1.04 Namco PCBboards with removable ROMs. I can't seem to find any of these REv 3.0 anywhere...and Chicago gaming techs aren't answering the phones and the sales department guy seems to be an idiot.

Hi Tim,

Unfortunately, there isn't a whole lot that can be done to this board without sending it back, but one thing I would like you to try is to adjust the power supply. It sounds possible that the voltage is too low, and is not letting the game boot fully.

Inside of the cabinet you should see a small silver or black box with red, black,white and possibly green wires attached to it. There should be a small knob on there as well. Turn it about 1/3 of a turn in the direction of the arrow. If there is no arrow, try turning it clockwise.

This will turn up the voltage, and may take care of the issue. Please let me know if it does.


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Brian Penzone


I can answer questions regarding coin-operated arcade game questions down to the logic board. Error codes, erratic operation, dead boards, I can help with them all. I can help with video monitors on a very limited and basic level only.


I have spent nearly 20 years as an avid arcade collector, and spent nearly 10 of those years as the lead tech for a large arcade operator, doing work for manufacturers and other coin-operated amusement companies around the globe. I maintain a good sized collection of arcade games, as well as a large inventory of spare parts for a wide range of arcade machines.

BA from The Ohio State University, Associates from DeVry University

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