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Video Game Repair/NBA Jam restarting


Similar to a previous question im having problems with recently purchased 1993 NBA Jam machine restarting.  Sometime it doesnt make it to the select players screen and sometime it makes it to the 2nd quarter.  First day I had it played 4 straight games w no problems.  Is it the power supply?? anything else i can do?

That absolutely sounds like the power supply. The easiest way to fix this is to turn the game off, remove the back of the cabinet, and look for the power supply (which should be a small silver or black box with red, black, and green wires coming out of it)

Look for the small knob and turn it to the right about 1/4 of an inch and then turn the game on. Repeat this until the game no longer reboots, and your problem is fixed.

The +5 volt line is the issue here, so increasing the voltage to at least +5V is what you need to do!

Hope this helps,

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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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