Hi guys.
A while ago my big guns was working fine all music and sounds were good. Then i powered the machine up a few days later and i had sound effects but no music.

Ive tested the ribbon cable and that seems good. ive read the data from the 2 sound roms on the sound board and they identy fine on the site http://romident.coinopflorida.com/

I cant see anything obvious on the sound board no bad previous repairs or anything although i believe the board is not original to the machine as the serial numbers dont match the rest of the machine.

I wondered if anyone had any ideas of things i could check? I have some basic skills but nothing too advanced.

Sound board pic.

[url=https://flic.kr/p/2jmE1f6][img]https://live.staticflickr.com/65535/50116859361_a6103c41e4_b.jpg[/img][/url][url=https://flic.kr/p/2jmE1f6]2020-07-15_09-23-35[/url] by [url=https://www.flickr.com/photos/151744201@N07/]Bean Beano[/url], on Flickr

If i could get hold of a spare board to try that would be great.
Any help would be much appreciated.

sound board (resized).jpg