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This is an Asteroids -05 version board. There was no complaint about this but it's driving me nuts trying to figure out what is causing this. I have replaced both DAC's, the TLO81's, 82's, and 4016's. Nothing has changed this. I'll take any advise right about now. It also is not my monitor. Pic...

Picked this up today. Doesn’t work. Haven’t looked at it yet.

I have a non-working centipede board that I want to bench test. I bought a Jamma harness and adapter board from arcade shop. I have two issues. First, is other than the power and ground, nothing else seems to pin out to the correct pins on the centipede side. For instance pin 12 on the jamma...

I have an Asteroids board -04 version G. Fairly certain it has a DAC problem, but this board uses 137150's not the 561's I'm used to seeing. Anyone else come across this? I have not. Can the board be converted to use 561's by removing the 136150 and populating the area where the 562 would be?

Asteroids upright was working good. Turned it on and no picture. Noticed no neck glow. Fuses are good, coin door light works. Not the game board causing it. Also spot killer not on. Not sure what to test on this. Thanks.

Another Asteroids board. This board works good, except this is what I'm getting in test. I'm thinking Y position counter? One of the 191's.

This is a 02 version B board. Game plays blind with DMAGO disabled. This is what I'm seeing on the screen, in test. As you can see I'm getting a good crosshatch pattern, but I have too many numbers across the screen, both top and bottom. Game was only resetting in game mode yesterday, today it's...

What causes this? Turn the machine on, and test screen is garbled, but will slowly draw the lines and then ends up perfect. Took a video, but too large to load, so took screen shots. Takes maybe a minute to straighten out. Spot killer will be on when first turning on, I will unplug the monitor...

I've been using my asteroids cab for testing boards. This morning I put a board in and red light on the PCB lights up, but only seeing 2.2 volts to the board. Unplugged the board and checked for 5 volts on the regulator board and have 6.0 volts, until PCB is plugged in. I figured something up...

I have another Asteroids board that I have worked through. Board works great, except it has an intermittent reset. Watchdog not barking, just a quick blip every so often. Looking for ideas on how to narrow down whats causing it. I don't want to just start replacing chips.

I have an Asteroids board that has a non functioning reset button on the board. Anyone know where I can get a replacement? I did spray it with detoxit.

Maybe this will help someone in the future. I'm sure you seasoned repair guys know this, but I did not. On at least this board, Atari must have made a mistake that caused no X output, causing a blank screen, but will show on a scope in XY mode. They had the traced from pin 9 @ K9 going to Pin 9...

I have version -02 board. The ship fire sound is more of a buzz sound. At times the first fire sound is correct, then just just a buzz sound with every push of the button. I have replaced the caps @ C40, C47, C48, C50. Replaced the transistors Q1, Q5. Replaced LM324 at L8. Replaced the 555 at...

I have a Fluke 9010a, and a 6402 board. I wanted to see how it would work on an Asteroids board that I picked up as a back up for the one I repaired. Board passes the bus test. When doing the RAM test short or long I get this message when looking at 0000-01FF. R/W ERR @ 0000 BTS BF-LOOP? What...

Could use some help. I have an Asteroids game that will not boot up. Pin 40 on the CPU shows constant watchdog resetting. I removed the IC on L6 , put in a socket and left out pin 1. Still watchdogging, indicating problem on CPU side. Clock crystal was loose, so I replaced it. Clock signal is...