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This weekend I picked up a Galaga that is generally in good shape. However, am guessing it was partially dropped at some point as the bottom panel had broken free. Many of the plastic knock-down tabs are missing and most of the glue blocks have separated between the bottom and side. I replaced...

I was testing my Defender PCB with a K49XX in my JAMMA Robocop and got an unexpected result. The image is rotated 180 degrees. I have not had time to dig into it and was hoping someone had a simple explanation. Have not tried this monitor with any other boards besides Robocop (which is upside...

Is there any problem connecting my Defender (in its own cabinet running from a Williams PS) to the G07 in my Pole Position cabinet (being powered via the isolation transformer in my Atari PS)? I need to test the video out of the Defender board and since the G07 accepts positive hsync/vsync, that...

I have a K4600 in my Defender that has always looked pretty bad (very poor color). I went ahead and used it for my first recap. Post recap, the monitor still works (yeah) but it probably looks slightly worse. Can someone provide some advice on how to adjust the colors. I have looked at the K4600...

I picked up a Galaxian cabinet cheap and everything was going really well. Fixed the PCB, fixed a couple wiring issues, put it all together and the K4500 monitor came up. Not the greatest picture, but working. The picture was a bit narrow so I decided to try adjusting the width coil to see how...

I picked up an old Galaxian cabinet this morning, pretty complete but in need of some relatively serious TLC. The prior owner was planning to restore, but never got around to it (and his wife wanted it gone). As a first step, I wanted to try out the PCB on my bench and see if it works and/or...

I have a pair of dead Galaga pcb sets (real midway, not clones) from which I trying to revive one. Not having a working set for reference, I don't have a good comparison point, but am making some progress. After replacing the 74128 on one of the PCB boards, I got it up and running. Logic probe...

My Defender (later system board with CPU @ 2I) unexpectedly froze after being powered on for several hours last week. The video displayed a frozen attract mode screen (and it would not respond to any buttons). After I power cycled the cabinet, it came up with a blank screen-- no sound or...

I noticed on my Asteroids upright that when plugged in but not turned on, if you touch something metal like the coin door (or the power switch itself), you can feel a mild shock. Someone previously cut the ground pin from the electrical plug. Would that cause this or should I just be looking for...

I picked up a Defender recently which had some issues. I got it working and all was well until the power supply failed and took the RAM with it. I have put an arcadeshop.com switcher in its place and replaced the RAM. At this point the unit powers up, plays the standard power-up sound, video...

I set my Pole Position to Free Play and was disappointed to find the game went immediately to qualifying, completely bypassing attract mode. Essentially, just a constant gameplay loop. On my PP2, it does essentially the game thing though it sits waiting at track selection. In either case...

I happened to pick up a Defender upright today. After fixing a broken power switch and reseating connectors, verifying power supply voltages, it came up and played. Spent about 15-20 minutes with it and everything was pretty good (though color was a bit off). This evening I fired it up again...

I recently picked up a Xevious board set that was thought to be working. Overall condition is decent with no obvious damage other than some minor corrosion on part of the video board (looks like high humidity). When I tried to fire it up, nothing happened. I eventually realized that the Video...

While fixing my Pole Position boards, I quickly found that hauling them back and forth from work bench to the cabinet was a pain. While I ended up doing the repair that way, I wanted a small monitor for my work bench for easy testing. I thought back and realized that I had an old AppleColor RGB...

I just picked up a PP2 board set intended as a parts for my PP1, but with some very minor work (adding alternate power lines to the video board to bypass the burned out edge connection), it actually works. Only two issues I need to track down: 1- It only shows in km/h regardless of switch 6. I...

I recently picked up an Atari Pole Position. It is in fairly rough shape, but runs. Self-test passes, sound is good and basic game plays. However, there is something wrong with video display of billboards and cars. Attached is an image for inspection. It appears that only every other video...