Basic Troubleshooting Of An Arcade Game
Before you can fix an arcade game, a pinball machine or any electronic device, you have to first accurately analyze the problem. A few tools and a good eye will take you a long way towards performing a professional repair. In this post, we’ll discuss some simple steps you can take when you are starting a repair job.
Step 1: It’s usually easier to determine what is wrong with a game by determining what is right. Are there any signs of life at all? Does the marquee or other lights work? Do you hear the monitor? Does the game play blind? (i.e. the monitor has no picture but you hear sound from the game) If the game is appears to be dead, start simple. Do you have 120 VAC going into your power supply? If your power supply is good, is it supplying the correct voltage (usually 5 VDC and 12 VDC) to you main board and other components?
Step 2: Always start with the obvious. Try using the self test on the PCB or in the test menu if the monitor is working. Input and output tests will tell you if certain things are functioning properly. Find a manual for the game online and look for troubleshooting tips inside of it. If the manufacturer is still in business don’t be afraid to give them a call. Look for places that look burned or have loose wires or connections.
Step 3: Use a multimeter. Don’t trust your eyes, trust your meter. Check for blown fuses. Read the manual for your meter or find one online. There are many things you can use your meter for from simple tests down to the component level.
Step 4: Check all wiring. Do some basic continuity checks with your meter and make sure you have good connections. The wiring harness can be a common place for issues as previous owners might have flexed the wires or mishandled them. Trace down the wires using the connector on the harness as a test point.
Step 5: Ask for help! If you are ever reach a point where you don’t feel comfortable, it’s a good idea to ask for assistance. There is no shame in asking a question only in being afraid to ask! Make sure you have as much information as possible when asking for help. Information like the name of the game, the manufacturer and time period are very helpful to someone trying to assist you. Please feel free to leave a comment on our site or email us with your question. We will try to assist you in any way possible.
Always make a commitment to doing the job right. Don’t take shortcuts or do it half way. Your arcade game deserves better and you will be glad in the end you took the time to do it right. Good luck with your projects in the future and again please feel free to leave any questions or suggestions in the comments section below.
Thanks for the invitation to ask a question. I have a millipede game (atari) and have two issues. BTW I’ve had the board checked by mikesarcade and they claim all is good.
First the sound has stopped working. I have determined the speakers are fine and there is power to the amp. When I disconnect one of the terminals and reconnect there is an amplified “pop” so I guess the amp is functional. It worked before I sent the board to Mike’s.
The secon issue is that I noticed a row of “mushrooms” that sometimes appear on the top of the screen and work their way down and sometimes I see a colum of them and they seem to reset the game when they reach the bottom of the screen.
Please tell me where I start and if you have any good suggestion on where I can send the board (CPU) for repair if this is not a novice type of repair.
Thanks again for the help!
Rob
Rob,
First off, we have done business with mikesarcade for years and feel that they are a trusted and reliable arcade repair service. It sounds like your problem is in your AR (Audio Regulator) board. This board controls the voltage going to your motherboard and your audio amplifier. You can get an AR board repair kit from The Real Bob Roberts for about $7 to $15 depending on the model of the AR board you have. These repair kits are fairly easy to install and can be applied in 30 minutes or less. We highly recommend doing this! If it doesn’t entirely fix your problem, it should at least prevent future problems from occurring.
Thanks for your question and keep us posted on the results of your repair.
I have a donkey kong 2 board set game. There are a few sound problems with it. It keeps playing the same background music from a section of the completion of the rivet board. It also is missing other sounds in the game such as monkey laughing hammer, striking objects, and effect of jumping over objects. I don’t know what section of the board controls these actions. please help me understand where to look.
Also the colors are not very bright and not correct no matter how much I adjust everything. Is this a symptom of caps or bulb. It still has original sanyo monitor.
Thank you for your time.
Rick Anzalone,
Nintendo arcade games are notorious for having the sound board attached to the monitor frame. This problem sounds like it might be related to this board. Both Arcade Shop Amusements and Bob Roberts sell a Sanyo 20EZ Audio Board Repair Kit. We suggest getting this repair kit and installing it on your board. Hopefully this will solve your sound issue. Concerning your monitor issue, we would definitely start off by applying a cap kit to your monitor. This is always a good place to start when you have issues like low brightness and washed out colors. Try a cap kit first and let us know if you continue to have brightness or color problems with the monitor.
We have also featured your question on episode 1 of our Q&A podcast. Look for it to be posted on our website soon. Thank you for your question and let us know if we can assist you further.
As far as the sound problem I replaced the 8035 chip on the cpu board and all sounds worked properly.
I installed a cap kit but my problems still remain. However I did find that somebody had replaced them before and one of the values were wrong and it repaired a problem I was having with the screen being divided when turning it on.
The color problem is this, everything that would be white is green,the red and blue are very dark and has trouble making browns, pinks, and purples. I replaced chips at 2E cpu, 2F cpu, and 2N video and no change. These chips are for color. I would like to know if the Z80 chip processes the color before sending it to the monitor or if this is a monitor issue.
Thanks again.
i have a question concerning my pac-man coctail arcade it was made in 1981 in franklin park illinois when i plug it in the picture comes on and pac-man does his rounds but the power pellets never go away and then the picture will fade away please help
I found an article on the net about crt’s and it made me decide to take it to a tv repair man to rejuvinate the tube. The guy was nice enough to show me how the restorer worked and removed a short but did not fix it. He said I could find an old tv and if it fit the neck board it would work. I did just that at the thrift store, and with minor modifications it worked. Thank you for this site and introducing me to the begining basics of arcade troubleshooting.
Hey all,
Just purchased an NBA Jam machine and I just lugged it inside, plugged it in to find out that I can hear the power working, however, only a black screen and no game sounds. Not sure where to look or what to do. Any tips as to how I can get this working?
Thanks!
Rick,
We are glad you got your problem resolved. We were kind of curious about which game you are actually referring to though. Is this a Donkey Kong Junior or a Donkey Kong II: The Return Of Jumpman? We have also featured your question on episode 2 of our Q&A podcast. Look for it to be posted on our website soon. Thank you for your questions and good luck with your future repairs.
Jacob,
Sounds like you might be having some board trouble, however, it’s really hard to narrow down what chips are having problems without seeing a picture or video of the issue. You can get pacman replacement chips from Bob Roberts for about $10 a piece. You could always get a full set of chips and replace them all but more than likely there is just an issue in one or two of them.
We have also featured your question on episode 2 of our Q&A podcast. Look for it to be posted on our website soon. Thank you for your question and please send us a video or some photos so we can help your further.
Dave,
First question we have is was it working at the time of purchase? If it was then your problem is probably related to a loose connection somewhere. Check your harness that connects to the board and make sure it is connected good. Next thing to check is the power supply. Please refer to our post on Checking And Replacing A Power Supply for more information on checking a power supply.
We have also featured your question on episode 2 of our Q&A podcast. Look for it to be posted on our website soon. Thank you for your question and good luck with this repair.
I purchased a Space Duel game and at that time it had a small white dot in the middle of the monitor screen. Within a few months, the white dot is now the origin for lines that go to all the objects floating on the screen (vector lines?). My question is if there is an adjustment I can make to the monitor to fix the problem or is this the result of another issue. The game still plays, the color is great and the sound is great. The only issue is the annoying lines. Thanks in advnace.
Robin
Robin,
The first thing we would try is to adjust the brightness control on the monitor. There are typically 2 places on the monitor chassis where you can adjust this. Check out our post on Adjusting An Arcade Monitor for help on locating these brightness controls. If this does not solve your problem then you might be having a problem with another part of your chassis. Please keep us posted on your progress.
We have also featured your question on episode 4 of our Q&A podcast. Please listen to it for more of our thoughts on your issue. Thank you for your question and good luck with your repair.
I have a ms packman coctail arcade all works fine untill I or my children bump the machine or tap the glass. The game then restarts and you loose your coins…….I need help to fix.
Dave,
Sounds like you might be having a problem with a kill switch. Make sure that the kill switch located in the front of the game behind the coin door is being depressed by the door itself. If this is not the case then you could have a short in your wiring. Run some continuity checks between your power supply and harness to see if it is shorting or not.
We have also featured your question on episode 6 of our Q&A podcast. Please listen to it for more of our thoughts on your question. Thank you for your question and stay tuned for more videos and podcasts.
I have had a Pac-Man machine for about 5 years with no problems whatsoever. However, when I recently moved and then later plugged it in, I was unable to play it. It powers up perfectly fine but the monitor now has only one line across it, like it was completely vertically compressed. I can still press the start buttons and hear it start and work like normal. In that line that I still see, I can still see objects moving around as well. I could really use your help. Thanks.
Adam,
Sounds like you are having a problem with the vertical section of your monitor chassis. We would recommend following the yellow yoke wire to your chassis which should lead you to the vertical section. Reflow the solder around the caps and the vertical IC chip in this section and see if this solves your problem. If the problem continues you might try replacing these parts in this section. Check out post on More Troubleshoooting Monitors With Michael for more information.
We have also featured your question on episode 10 of our Q&A podcast. Please listen to it for more of our thoughts on your question. Thank you for your question and good luck with your repair.
I have a Street Fighter 2 game that seems to have a short in it some where. As soon as I power it on the fuse at the power supply pops. What are some basic steps to isolate the short?
Thanks
Ed,
We would recommend trying to unplug some of the inner parts of the cabinet to see what’s supplying the feedback to the fuse. You might want to start off by turning the game off, unplugging your board and turning your game on to see if it blows the fuse. If it still blows the fuse, try unplugging the monitor followed by the coin door lights, control panel, marquee light, etc. It’s obviously something in your cabinet that’s supplying the feedback. The best plan we can give you is to get a lot of fuses and do some process of elimination to see if you can isolate the issue to a particular area.
Also, you might do a quick check of your AC voltage coming from the wall as well as your power supply to make sure you are getting the correct voltage in both places. It could be that your power supply is giving out the incorrect voltage causing the fuse to blow. Take a good look at the parts in this area to make sure they are functioning properly.
We have also featured your question on episode 12 of our Q&A podcast. Please listen to it for more of our thoughts on your question. Thank you for your question and good luck tracking down your issue.
I have an Area 51 arcade game and it just stopped working. Could it be a fuse or what else should I look for? I have no idea.
Sherrie,
Yes it could definitely be a fuse that caused your game to stop working. We would recommend checking your fuses, power supply, kill switches and power switch. The issue could be caused by any one of these parts. Please see our posts on Checking And Replacing A Power Supply and Checking Fuses With A Multimeter for more information.
We have also featured your question on episode 15 of our Q&A podcast. Please listen to it for more of our thoughts on your question. Thank you for your question and keep us updated on your progress.