Joust Boot Error.

ThatArtGuy

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My cocktail was working for months. Today, I turned it on and it would work until the high score table started to load. It would then just turn black.


Any ideas? I thought at looking at the ribbon cable, but haven't tested it yet.
 
I believe that's a bad 4049 chip on the rom board. does the error display turn into a u when it goes black?

IMG_20180328_020934.jpg
 
Usually, it just stays black. Sometimes I get a RAM/ROM error if I mess with the cable. Your reasoning is probably the correct one.
if the rom ribbon cable is suspect then I would start by replacing that first. if you don't have any 4049s I would suggest maybe getting some to have on hand. they're on the input boards too and are a failure risk. 40xx parts are MOS, not TTL, and are very voltage sensitive. if you're just putting the game together and it's dry and static electricity builds up, you could've zotted the rom board. it happens. and if you're doing the rom ribbon, I would encourage replacing the input ribbon cable too.

the power header pins and plugs would be next up. I have some resources here that I should probably take the time to update someday. perhaps when I have downtime during the holiday this week. https://www.arcaderepair.net/williams/
 
Also dumb question but do you have fresh AA batteries on the main board?
it will still work without batteries. you just have to press Advance to get past the factory settings restored message or hit the reset button on MPU.

I've been wondering where the updates are on this mission.
 
it will still work without batteries. you just have to press Advance to get past the factory settings restored message or hit the reset button on MPU.

I've been wondering where the updates are on this mission.

I modded it with a cell battery. As for the mission, I need parts.
 
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