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I have a Space Invaders that I am bringing back to life. So far everything in it needed repair. I am up to the last problem and am stuck. The monitor isn't showing the whole picture. I would say the least bright pixels. I will post pictures. If I move the contrast pot back and forth the whole...

here are some pictures. It won't play a game. It looks like it resets video and it's like a lightning bolt across the screen. Let me know what you guys think. I think my analog section is good. Maybe counters?

I am at another point that I am stuck. Program is resetting until I lift pin 1 on L6 (DMAGO) I don't know what is the best way to troubleshoot. Should I leave the pin out and prob around or should I put it back in. I think out is the way to go but want to ask first. I think when you have...

I have a pain in the asteroid board. If you put the game on red lights on no reset just stay low. I replaced all RAM, ROM and CPU sockets. All RAM, ROM, and CPU tested. If I put 5v on pin 40 game will play with graphic problems. I lifted pin 1 of L6 (DMAGO) still stays LOW. I dont now what to do...

I have two board sets of Omega Race and they both don't save the high score. This has been like this for a while but I always wanted to fix it. One of the board's is a repo I built so all new parts. I saw the file with the voltage table and everything looks good except lower voltage because I am...

Noisy picture with volume up. This wouldn't bother me if it would let me set it at my ideal volume without any noise but that's not the case. I turned the volume all the way up for maximum effect. Things I did check polarity on AC and on monitor, speaker, good ground throughout game, power...

Hi my Star Wars yoke is not centered properly anymore. I took a look at the yoke and found no problems. Pots are are aligned properly. At this point I think that it must be something on the PCB board. Maybe the A/D converter chip is bad. Atari part 137249-120 any help would be appreciated.

I wish my space Duel could be louder. Of course I have the volume set 100 percent. If I put my Tempest at 100 percent it would be blasting. Maybe I should replace the amp on the power supply.

My Star Wars has some Matrix errors. I included a picture. The PROMs are good sockets look fine. I pulled 2 ls165 and 2 ls245 all okay. If the sockets are bad can you tell by looking at them or do they break on the bottom. I included a picture of the errors. Thanks for any help.

Okay I wanted to set up my Starcastle cof free play and high score saves. I burned a set of EPROMS and installed it on the board set dip switch to reset score and installed it in my game. Game boots I play a game and everything is fine. Maybe 5 minutes later the game starts making a beeping...

This board seems to be finicky on which chips to use anyone have any ideas. Also programming speeds?

What would be the minimum power requirements to bench test a space duel board. I would just like to get CPU side working first. I tried 5 volts on a known good board and that didn't Boot It Up. There must be something I'm missing!!!

StarCastle monitor popping breaker. I followed instructions on the manual for troubleshooting. Breaker stays on fine if you pull the Yoke and pull the CRT socket. I tested all voltage Regulators which I did replace with 1.5 amp models and they are fine. I am thinking about replacing the 2 op Amp...

StarCastle monitor popping breaker. I followed instructions on the manual for troubleshooting. Breaker stays on fine if you pull the Yoke and pull the CRT socket. I tested all voltage Regulators which I did replace with 1.5 amp models and they are fine. I am thinking about replacing the 2 op Amp...

I have an Asteroids Deluxe that has some bad 2516 eproms. I would like to replace with 2716 eprom. Can I do this? Can I mix them or do I have to do the whole set with 2716. thanks for your help

Okay I had a working Starcastle board and managed to break it by plugging in a defective soundboard any ideas where I should start.

Hi I have a star castle that has sound problems I was just wondering if you just plug in the soundboard all by itself should it be silent. I am thinking yes as the CPU board would make it output a sound. Let me know what you think.

I have a Tempest board that is dead no clock at cpu. I have tested all ram, prom, ok. I have clock up too pin 5 on the 193 counter it has been pulled and tested same for A6 B4. I think I have something pulling down the clock. Any help would be great.

I need help trying to get this pinout for this tube. Thanks

Hi my Star Castle Audio board works fine and sometimes not. What happens is the q17 and q18 get piping-hot and eventually blows the breaker #1. I have two boards and they both do the same thing. I have replaced all electrolytic capacitors on both boards and transistors q17, q18 ,power...