I have talk and background sounds but no music on my F-14 Tomcat. PinWiki don't talk much about sound problem troubleshooting.
I can't see what model the sound card is but at boot up I get 1 bong. I have a logic probe and a radio shack oscilloscope to help troubleshoot with. Any help would be greatly appreciated!

EDIT: D-11581 Sound board

Done. I ohm each leg for continuity to make sure that the cable was good. Ill also re-heat the solder points to make sure there is no cold solder joints.

Thank you for your reply!!

Is this board like the early Williams boards that need the capacitors replaced?

Re-seated the ROMs on both the MPU and sound card. Got the bong, but still no music.

I found this post that said that the oscillator (CR1) was the problem, sure enough I have no pulsing at the oscillator.
https://pinside.com/pinball/forum/topic/repair-williams-system-11-d11298-f-14-tomcat-sound-board-no-music-snd-10

EDIT: Never mind, I tested the wrong oscillator....

No sir, the caps look good, but I am going to order a kit to replace the caps. And I will start on your suggestion tonight after dinner. Thank you!

20200803_175430 (resized).jpg

I re-seated all the chips that was in a socket. I also test pin 1 and pin 7 on chip U16. I only had 4.8 volts on pin 1. Nothing on pin 7.
Now I'm tearing apart the house to find some kind of headphone to test with. Having 2 boys, there should be something laying around.

Thanks gutz I'll give that a shot. Now I have to try and find a YM3012.

No, I better do that before I try to find a chip. Looks like that chip will be hard to get.
I got caught up last night trying to find some headphones or ear plugs.

Cpu is pretty active, the PIA, only half of it is active.

Cpu
1 Low 21 Pulsing
2 High 22 Pulsing
3 High 23 Pulsing
4 Pulsing 24 Pulsing
5 Pulsing 25 Pulsing
6 Low 26 Pulsing
7 High 27 Pulsing
8 Pulsing 28 Pulsing
9 Pulsing 29 Pulsing
10 Pulsing 30 Pulsing
11 Pulsing 31 Pulsing
12 Pulsing 32 Low
13 Pulsing 33 Pulsing
14 Pulsing 34 Pulsing
15 Pulsing 35 Pulsing
16 Pulsing 36 High
17 Pulsing 37 High
18 Pulsing 38 Low
19 Pulsing 39 Low
20 Pulsing 40 High

PIA

1 Low 21 Pulsing
2 High 22 High
3 High 23 Pulsing
4 High 24 High
5 High 25 Pulsing
6 High 26 Pulsing
7 High 27 Pulsing
8 High 28 Pulsing
9 High 29 Pulsing
10 High 30 Pulsing
11 Low 31 Pulsing
12 Low 32 Pulsing
13 Low 33 Pulsing
14 High 34 High
15 Low 35 Pulsing
16 High 36 Pulsing
17 Low 37 High
18 High 38 Pulsing
19 High 39 High
20 High 40 Pulsing

This is fixed by changing out the MPU

There was a lot of acid damage to the MPU that was causing my sound problems. The MPU was in very bad shape, so I replaced it and have not had any problems since.

Try changing out the PIA and see what happens.