Even though the manual only calls out audit #18, try setting audit 16 to the end all to '03'.

If it still is not right, check the connectors. The male header pin solder joints on the sound board are probably most suspect.

Have you recapped the sound board and inspected it for bad solder joints at all the male header connector pins?

The faq for big daddy states he has a min order. That's why the high shipping

It is not going to be the caps based on your description.

before bouncing around and doing board work. Did you do what i said? Set all audits past #16 to 03. All the other games that came out around Grand Slam are set for sound this way. IT is not just option 18 it is 16-19 on similar games like Black Pyramid and KIngs of Steel which I own.

Still no go, it is probably the male header pins with a broken solder joint (assuming all solenoids work properly since they share signals).

Still no go, id swap in a known good PIA, RAM and verify the ROM. (the cpu doesnt check the ROM checksum, doesnt check that it can change the PIA outputs or check that the RAM is good).

Someone re-socketed some chips on that, I wonder if they screwed up somewhere. Take a pic of the backside so we can see the solder joints of the J1 connector and the previous rework.

On a side note, I am surprised Bally Used this sound board over the "cheap squeak" sound board. They must of had extras.

I will listen to it later., no speakers on this pc.

I see a few suspect looking pins on the socket change rework, but looks OK overall i guess.

Hrmm.. I am not familiar with the game enough to tell if it is just a missing input signal, I would verify that you have all the proper input signals coming into the sound board, there will be four encoded inputs.. Put the game in sound test, put a logic probe on all the inputs. You can even check at the 4049 inverter inputs and outputs. If all the inputs are good, id swap in a known good PIA, then try a known good RAM, then a known good ROM and then a known good sound generator. Most likely input signal or PIA. Could be that RAM, i have had bad 6810 RAM make those sound boards play noise like when the ball went through a top rollover lane. If it still doesnt work, all the inputs are good, and you swapped all the socketed chips. there is a ic socket problems.

if you are stuck i can probably test/fix the board unless there is some major hidden solder work damage in the previous IC socket replacement.

This board is straight forward enough if changing all the socketed chips, and it is still not working properly means you are either missing a signal input (connectors or the 4049 since solenoids seem OK) or the person that replaced the IC sockets F'd up a trace.

if all input signals OK id suspect
PIA #1
RAM #2

Knocker coil is unrelated. Could be disconnected because it is loud or could be disconnected because the circuit has an issue. I would check the solenoid resistance before reconnecting.

do you have a logic probe?

on the schematic you will see the input connector plug. Four pins will be labeled A-B-C-D. Those are the signals from the computer board to play sounds. The sound select signal is done in a 4 bit encoded pattern. If one of those is bad, you will get wrong sounds.

The A-B-C-D signals will go to a 4049 chip. That chip is an inverter and it flips the signal. When you look at those signals during sound test, one side of the 4049 gate with be mostly HIGH with blips LOW, the other side of the 4049 gate will be the opposite. Mostly LOW, with blips HIGH. Investigate those signals flowing through the 4049 chip and making it to the sound generator. That chip does fail and can cause your symptom.

Pages_from_Bally_1980_Silverball_Mania_Manual_(resized).png

If all the input signals are good, replace the RAM, then replace the sound generator would be next course of action. The RAM is not tested at startup, you can use a 6802 chip with internal RAM too if you change a jumper.

i'd do the 4049 next.
then ram
then sound gen

.... depending on your PCB rework skill do the socketed chips first because it is less invasive. Most likely it is the 4049 at this point.

ebay.com link: ELENCO LP 560 Logic Probe with Audio Beeper SPECIAL

great tool. You don't need a scope in most cases of pinball repair and that probe will suffice. Perfect tool for investigating the signals going through the 4049 chip.