jkoolpe
Well-known member
Hey all!
Well, picked up 2 very nice Tempest uprights a little while back...they were complete and in very nice shape overall (one even had Clay's multikit installed), but both were not working and had board and power issues.
I have one fully working again, and the other I have both rebuilt the A/R board and rebuilt the monitor so both items are now working fine.
But the last issue I'm still trying to figure out is with the board from the latter machine which is the board with the multikit on it. It was originally playing blind so I found and replaced 2 bad chips in the analog output section which brought back the output. And I reflowed the solder for all of the pins for the interconnect cable (on both the main and AUX boards).
I now can get to the menu select screen, and the game plays the Breakout game fine, but whenever I try to bring up one of the Tempest selections, I get a hot mess on the screen.
Video is here:
https://youtu.be/2b6lVUxPd24
Originally when this happened, the self-test would give me a RAM error with the beeps telling me that the 2114 RAM at location "L3" was bad. So I changed out this chip and the error message went away, but now I see the mess in the video
. I rechecked the socket I had installed for the new RAM chip, and it appears to be fine as far as I can tell.
Any ideas on where to start looking/probing now?
Thanks in advance.
Jon
Well, picked up 2 very nice Tempest uprights a little while back...they were complete and in very nice shape overall (one even had Clay's multikit installed), but both were not working and had board and power issues.
I have one fully working again, and the other I have both rebuilt the A/R board and rebuilt the monitor so both items are now working fine.
But the last issue I'm still trying to figure out is with the board from the latter machine which is the board with the multikit on it. It was originally playing blind so I found and replaced 2 bad chips in the analog output section which brought back the output. And I reflowed the solder for all of the pins for the interconnect cable (on both the main and AUX boards).
I now can get to the menu select screen, and the game plays the Breakout game fine, but whenever I try to bring up one of the Tempest selections, I get a hot mess on the screen.
Video is here:
https://youtu.be/2b6lVUxPd24
Originally when this happened, the self-test would give me a RAM error with the beeps telling me that the 2114 RAM at location "L3" was bad. So I changed out this chip and the error message went away, but now I see the mess in the video
Any ideas on where to start looking/probing now?
Thanks in advance.
Jon

