Check if all give sounds fire in sound test. You're probably missing one signal line.

Sorry, not sound test, I misspoke. Coil test 9-13 iirc should all make sound

It's the third test I think... Put the coin door switch to manual down and hit advance until the coils start firing, it'll show the coil number. There should be better directions in the manual.

Did you swap the sound and speech boards into Steve's Gorgar as a set?

It looks to me like DS1 switches on the sound board are backwards. Switch 2 is on the top and should be ON and to the LEFT, Switch 1 is on the bottom and should be OFF and to the RIGHT.

It also looks like somebody may have removed the W1 jumper (between 10J3 and R11) recently as it is only used in games without the speech board. No jumper is correct for what you want, it just means this is probably not the original sound board

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Unless its an optical illusion in the photo those dip switches are not set correctly for speech.

Maybe they were accidentally moved after it was tested in the other game? Will only take 2 mins to double check, based on coloration it even looks like switch 2 spent most of its life in the other position.

But did 9-13 all make distinct sounds?

But are there different sounds for each one? There are more sounds on the gorgar chip than just what is used in gorgar, it was used in other games, so that you can get other sounds in the test isn't necessarily wrong

If the board worked fine in the other machines, then I think the board is fine. Assuming it's fine, I would be looking at the connector 10J3 on the soundboard (the 9-pin). According to the schematics, that's the only connector that deals with sound/speech of any kind.

I'd take the connector off and inspect it for connectivity. Can you see the wires in the connector? Are they securely in the connector? Does it look like they are making contact with the pins when fastened to the soundboard? If not, that's the issue.

If they are fine, I'd check the same thing on the other end of those wires.

IMO, all you have is a communication issue. Communication = bad wires or bad connection (in my experience).

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Awesome job! Most repairs are simple, just like this.

Enjoy.

A little guidance please.... We have a working gorgar machine... HOWEVER it will not stay working if we close the coin door. ???????? To keep it playing and staying booted up...It will crash.....If the coin door. it not open ....WtHeck
Any help or thoughts please. THX> Victoria.

Coin door shorting to anything inside when closed ?

Coin door harness wires shorting to anything or inside harness where you can't see it ?

LTG : )

Try unplugging 1J4 and see if it stops happening