Pleiades speaker crackle

If all the sounds are garbled, I'd start by replacing C32 near the volume pot and C39, C40, C41, and C42 next to the LM380 amplifier chip. After that, replace the LM380.
 
All of the sounds are clean and crisp. Just during attract mode with the attract music off it has this crackle/hum thing going on. If I turn the attract music on the crackle/hum goes away. Only issue is the attract music is annoying if it's the only game on so that has to be turned off.
 
Thanks to channel manic for giving me the cap locations. I replaced the electrolytic caps at C39/C40 and replaced the pot. The hum is gone!

Now hopefully a cap kit/new flyback will fix the massive wave and blurriness the monitor has.
 
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