What do the X and Y outputs look like? (measure w/ AC on meter) Are they both stuck at 0? Is one moving but not the other? Turn the screen up on the monitor to bypass the spot killer. What does the display look like? Check the +15v and -15v in the vector output section. etc....
Jon
At 09:30 AM 11/2/2000 -0500, you wrote:
>Hello Folks,
>
> I have a pesky Major Havoc board that refuses to give me any video. I have replaced all chips in the video output section (AM6012, LF13201, TL082CP, TL084CN, DAC08CN) as well as the transistors Q6 & Q7 (linear scaling section of circuit). I am pretty much at a loss here. I thought replacing those buggers would work, but alas, no success. All other socketed chips have been brought over from a working board, so all RAMS, ROMS, CPUS, AVG - 13379-?? chip (AMI), POKEYS, ATARI Custom Chips, - literally everything that was originally socket plus the newly socketed chips mentioned above are working chips).
>
> The game plays. I can pump credits, click the start and audio kicks in proper sequences and the game plays... blind. Where do I go from here? I am definitely at a loss for my next step and any help would be appreciated.
>
>Cheers
>/\A\n\d\y/
>
>Andrew Evrovski
>Development Director
>Cyberplex Atlantic, Halifax, NS
>(TSE:CX)
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Received on Thu Nov 2 10:23:25 2000
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