History of maintenance/repairs on the machine? Have all the header pins on the boards been addressed, does the sound board or aux board have any SCANBE sockets, etc.?

Richard

Ribbon cables can wear out. Try flipping the ribbon cable between sound and voice board and see if the same sounds are off, or if it's now different ones.

I might try replacing the sound ROMs too, in case one of the chips is failing. You can probably get replacements in your hands pretty fast from Dave Astill.

I didnt' word that well. The red stripe on the cable aligns with pin 1s of the headers on audio and speech boards. Try flipping the cable so the red stripe aligns with pin 40 (or whatever the highest # pin is) on each board. Upside down. So in theory, the header pins should still all be connected the same, but if the failure is one of the lines on the ribbon cable, now you'll have different sounds playing wrong.

I don’t think you can flip the cable on system 6 sound boards. The voice card side is not a typical ribbon cable header connector.

A good way to rule out the ROMs is to press the diagnostic button on the sound card. If it plays the sounds and voice prompts properly, you can rule out the ROMs. The list of sounds any voice is listed in the FP handbook, I believe.

Playing wrong sounds is usually bad connections between the driver board and sound card which is why header pins and associated connectors are suspect. When you reseated connections, did you the corresponding connections on the driver board?

Do you know if the ROM sockets were replaced on the sound card? Can you try lifting and reinserting the ROM on the sound card?